Mailman 3 May 2020 - Python-Dev

PEP 448 review
by Guido van Rossum 30 Mar '23

30 Mar '23

I'm back, I've re-read the PEP, and I've re-read the long thread with "(no subject)". I think Georg Brandl nailed it: """ *I like the "sequence and dict flattening" part of the PEP, mostly because itis consistent and should be easy to understand, but the comprehension syntaxenhancements seem to be bad for readability and "comprehending" what the codedoes.The call syntax part is a mixed bag on the one hand it is nice to be consistent with the extended possibilities in literals (flattening), but on the other hand there would be small but annoying inconsistencies anyways (e.g. the duplicate kwarg case above).* """ Greg Ewing followed up explaining that the inconsistency between dict flattening and call syntax is inherent in the pre-existing different rules for dicts vs. keyword args: {'a':1, 'a':2} results in {'a':2}, while f(a=1, a=2) is an error. (This form is a SyntaxError; the dynamic case f(a=1, **{'a': 1}) is a TypeError.) For me, allowing f(*a, *b) and f(**d, **e) and all the other combinations for function calls proposed by the PEP is an easy +1 -- it's a straightforward extension of the existing pattern, and anybody who knows what f(x, *a) does will understand f(x, *a, y, *b). Guessing what f(**d, **e) means shouldn't be hard either. Understanding the edge case for duplicate keys with f(**d, **e) is a little harder, but the error messages are pretty clear, and it is not a new edge case. The sequence and dict flattening syntax proposals are also clean and logical -- we already have *-unpacking on the receiving side, so allowing *x in tuple expressions reads pretty naturally (and the similarity with *a in argument lists certainly helps). From here, having [a, *x, b, *y] is also natural, and then the extension to other displays is natural: {a, *x, b, *y} and {a:1, **d, b:2, **e}. This, too, gets a +1 from me. So that leaves comprehensions. IIRC, during the development of the patch we realized that f(*x for x in xs) is sufficiently ambiguous that we decided to disallow it -- note that f(x for x in xs) is already somewhat of a special case because an argument can only be a "bare" generator expression if it is the only argument. The same reasoning doesn't apply (in that form) to list, set and dict comprehensions -- while f(x for x in xs) is identical in meaning to f((x for x in xs)), [x for x in xs] is NOT the same as [(x for x in xs)] (that's a list of one element, and the element is a generator expression). The basic premise of this part of the proposal is that if you have a few iterables, the new proposal (without comprehensions) lets you create a list or generator expression that iterates over all of them, essentially flattening them: >>> xs = [1, 2, 3] >>> ys = ['abc', 'def'] >>> zs = [99] >>> [*xs, *ys, *zs] [1, 2, 3, 'abc', 'def', 99] >>> But now suppose you have a list of iterables: >>> xss = [[1, 2, 3], ['abc', 'def'], [99]] >>> [*xss[0], *xss[1], *xss[2]] [1, 2, 3, 'abc', 'def', 99] >>> Wouldn't it be nice if you could write the latter using a comprehension? >>> xss = [[1, 2, 3], ['abc', 'def'], [99]] >>> [*xs for xs in xss] [1, 2, 3, 'abc', 'def', 99] >>> This is somewhat seductive, and the following is even nicer: the *xs position may be an expression, e.g.: >>> xss = [[1, 2, 3], ['abc', 'def'], [99]] >>> [*xs[:2] for xs in xss] [1, 2, 'abc', 'def', 99] >>> On the other hand, I had to explore the possibilities here by experimenting in the interpreter, and I discovered some odd edge cases (e.g. you can parenthesize the starred expression, but that seems a syntactic accident). All in all I am personally +0 on the comprehension part of the PEP, and I like that it provides a way to "flatten" a sequence of sequences, but I think very few people in the thread have supported this part. Therefore I would like to ask Neil to update the PEP and the patch to take out the comprehension part, so that the two "easy wins" can make it into Python 3.5 (basically, I am accepting two-thirds of the PEP :-). There is some time yet until alpha 2. I would also like code reviewers (Benjamin?) to start reviewing the patch <http://bugs.python.org/issue2292>, taking into account that the comprehension part needs to be removed. -- --Guido van Rossum (python.org/~guido)

7 17

PEP 1, PEP Purpose and Guidelines
by barry＠zope.com 18 May '21

18 May '21

It has been a while since I posted a copy of PEP 1 to the mailing lists and newsgroups. I've recently done some updating of a few sections, so in the interest of gaining wider community participation in the Python development process, I'm posting the latest revision of PEP 1 here. A version of the PEP is always available on-line at http://www.python.org/peps/pep-0001.html Enjoy, -Barry -------------------- snip snip -------------------- PEP: 1 Title: PEP Purpose and Guidelines Version: $Revision: 1.36 $ Last-Modified: $Date: 2002/07/29 18:34:59 $ Author: Barry A. Warsaw, Jeremy Hylton Status: Active Type: Informational Created: 13-Jun-2000 Post-History: 21-Mar-2001, 29-Jul-2002 What is a PEP? PEP stands for Python Enhancement Proposal. A PEP is a design document providing information to the Python community, or describing a new feature for Python. The PEP should provide a concise technical specification of the feature and a rationale for the feature. We intend PEPs to be the primary mechanisms for proposing new features, for collecting community input on an issue, and for documenting the design decisions that have gone into Python. The PEP author is responsible for building consensus within the community and documenting dissenting opinions. Because the PEPs are maintained as plain text files under CVS control, their revision history is the historical record of the feature proposal[1]. Kinds of PEPs There are two kinds of PEPs. A standards track PEP describes a new feature or implementation for Python. An informational PEP describes a Python design issue, or provides general guidelines or information to the Python community, but does not propose a new feature. Informational PEPs do not necessarily represent a Python community consensus or recommendation, so users and implementors are free to ignore informational PEPs or follow their advice. PEP Work Flow The PEP editor, Barry Warsaw <peps(a)python.org>, assigns numbers for each PEP and changes its status. The PEP process begins with a new idea for Python. It is highly recommended that a single PEP contain a single key proposal or new idea. The more focussed the PEP, the more successfully it tends to be. The PEP editor reserves the right to reject PEP proposals if they appear too unfocussed or too broad. If in doubt, split your PEP into several well-focussed ones. Each PEP must have a champion -- someone who writes the PEP using the style and format described below, shepherds the discussions in the appropriate forums, and attempts to build community consensus around the idea. The PEP champion (a.k.a. Author) should first attempt to ascertain whether the idea is PEP-able. Small enhancements or patches often don't need a PEP and can be injected into the Python development work flow with a patch submission to the SourceForge patch manager[2] or feature request tracker[3]. The PEP champion then emails the PEP editor <peps(a)python.org> with a proposed title and a rough, but fleshed out, draft of the PEP. This draft must be written in PEP style as described below. If the PEP editor approves, he will assign the PEP a number, label it as standards track or informational, give it status 'draft', and create and check-in the initial draft of the PEP. The PEP editor will not unreasonably deny a PEP. Reasons for denying PEP status include duplication of effort, being technically unsound, not providing proper motivation or addressing backwards compatibility, or not in keeping with the Python philosophy. The BDFL (Benevolent Dictator for Life, Guido van Rossum) can be consulted during the approval phase, and is the final arbitrator of the draft's PEP-ability. If a pre-PEP is rejected, the author may elect to take the pre-PEP to the comp.lang.python newsgroup (a.k.a. python-list(a)python.org mailing list) to help flesh it out, gain feedback and consensus from the community at large, and improve the PEP for re-submission. The author of the PEP is then responsible for posting the PEP to the community forums, and marshaling community support for it. As updates are necessary, the PEP author can check in new versions if they have CVS commit permissions, or can email new PEP versions to the PEP editor for committing. Standards track PEPs consists of two parts, a design document and a reference implementation. The PEP should be reviewed and accepted before a reference implementation is begun, unless a reference implementation will aid people in studying the PEP. Standards Track PEPs must include an implementation - in the form of code, patch, or URL to same - before it can be considered Final. PEP authors are responsible for collecting community feedback on a PEP before submitting it for review. A PEP that has not been discussed on python-list(a)python.org and/or python-dev(a)python.org will not be accepted. However, wherever possible, long open-ended discussions on public mailing lists should be avoided. Strategies to keep the discussions efficient include, setting up a separate SIG mailing list for the topic, having the PEP author accept private comments in the early design phases, etc. PEP authors should use their discretion here. Once the authors have completed a PEP, they must inform the PEP editor that it is ready for review. PEPs are reviewed by the BDFL and his chosen consultants, who may accept or reject a PEP or send it back to the author(s) for revision. Once a PEP has been accepted, the reference implementation must be completed. When the reference implementation is complete and accepted by the BDFL, the status will be changed to `Final.' A PEP can also be assigned status `Deferred.' The PEP author or editor can assign the PEP this status when no progress is being made on the PEP. Once a PEP is deferred, the PEP editor can re-assign it to draft status. A PEP can also be `Rejected'. Perhaps after all is said and done it was not a good idea. It is still important to have a record of this fact. PEPs can also be replaced by a different PEP, rendering the original obsolete. This is intended for Informational PEPs, where version 2 of an API can replace version 1. PEP work flow is as follows: Draft -> Accepted -> Final -> Replaced ^ +----> Rejected v Deferred Some informational PEPs may also have a status of `Active' if they are never meant to be completed. E.g. PEP 1. What belongs in a successful PEP? Each PEP should have the following parts: 1. Preamble -- RFC822 style headers containing meta-data about the PEP, including the PEP number, a short descriptive title (limited to a maximum of 44 characters), the names, and optionally the contact info for each author, etc. 2. Abstract -- a short (~200 word) description of the technical issue being addressed. 3. Copyright/public domain -- Each PEP must either be explicitly labelled as placed in the public domain (see this PEP as an example) or licensed under the Open Publication License[4]. 4. Specification -- The technical specification should describe the syntax and semantics of any new language feature. The specification should be detailed enough to allow competing, interoperable implementations for any of the current Python platforms (CPython, JPython, Python .NET). 5. Motivation -- The motivation is critical for PEPs that want to change the Python language. It should clearly explain why the existing language specification is inadequate to address the problem that the PEP solves. PEP submissions without sufficient motivation may be rejected outright. 6. Rationale -- The rationale fleshes out the specification by describing what motivated the design and why particular design decisions were made. It should describe alternate designs that were considered and related work, e.g. how the feature is supported in other languages. The rationale should provide evidence of consensus within the community and discuss important objections or concerns raised during discussion. 7. Backwards Compatibility -- All PEPs that introduce backwards incompatibilities must include a section describing these incompatibilities and their severity. The PEP must explain how the author proposes to deal with these incompatibilities. PEP submissions without a sufficient backwards compatibility treatise may be rejected outright. 8. Reference Implementation -- The reference implementation must be completed before any PEP is given status 'Final,' but it need not be completed before the PEP is accepted. It is better to finish the specification and rationale first and reach consensus on it before writing code. The final implementation must include test code and documentation appropriate for either the Python language reference or the standard library reference. PEP Template PEPs are written in plain ASCII text, and should adhere to a rigid style. There is a Python script that parses this style and converts the plain text PEP to HTML for viewing on the web[5]. PEP 9 contains a boilerplate[7] template you can use to get started writing your PEP. Each PEP must begin with an RFC822 style header preamble. The headers must appear in the following order. Headers marked with `*' are optional and are described below. All other headers are required. PEP: <pep number> Title: <pep title> Version: <cvs version string> Last-Modified: <cvs date string> Author: <list of authors' real names and optionally, email addrs> * Discussions-To: <email address> Status: <Draft | Active | Accepted | Deferred | Final | Replaced> Type: <Informational | Standards Track> * Requires: <pep numbers> Created: <date created on, in dd-mmm-yyyy format> * Python-Version: <version number> Post-History: <dates of postings to python-list and python-dev> * Replaces: <pep number> * Replaced-By: <pep number> The Author: header lists the names and optionally, the email addresses of all the authors/owners of the PEP. The format of the author entry should be address(a)dom.ain (Random J. User) if the email address is included, and just Random J. User if the address is not given. If there are multiple authors, each should be on a separate line following RFC 822 continuation line conventions. Note that personal email addresses in PEPs will be obscured as a defense against spam harvesters. Standards track PEPs must have a Python-Version: header which indicates the version of Python that the feature will be released with. Informational PEPs do not need a Python-Version: header. While a PEP is in private discussions (usually during the initial Draft phase), a Discussions-To: header will indicate the mailing list or URL where the PEP is being discussed. No Discussions-To: header is necessary if the PEP is being discussed privately with the author, or on the python-list or python-dev email mailing lists. Note that email addresses in the Discussions-To: header will not be obscured. Created: records the date that the PEP was assigned a number, while Post-History: is used to record the dates of when new versions of the PEP are posted to python-list and/or python-dev. Both headers should be in dd-mmm-yyyy format, e.g. 14-Aug-2001. PEPs may have a Requires: header, indicating the PEP numbers that this PEP depends on. PEPs may also have a Replaced-By: header indicating that a PEP has been rendered obsolete by a later document; the value is the number of the PEP that replaces the current document. The newer PEP must have a Replaces: header containing the number of the PEP that it rendered obsolete. PEP Formatting Requirements PEP headings must begin in column zero and the initial letter of each word must be capitalized as in book titles. Acronyms should be in all capitals. The body of each section must be indented 4 spaces. Code samples inside body sections should be indented a further 4 spaces, and other indentation can be used as required to make the text readable. You must use two blank lines between the last line of a section's body and the next section heading. You must adhere to the Emacs convention of adding two spaces at the end of every sentence. You should fill your paragraphs to column 70, but under no circumstances should your lines extend past column 79. If your code samples spill over column 79, you should rewrite them. Tab characters must never appear in the document at all. A PEP should include the standard Emacs stanza included by example at the bottom of this PEP. A PEP must contain a Copyright section, and it is strongly recommended to put the PEP in the public domain. When referencing an external web page in the body of a PEP, you should include the title of the page in the text, with a footnote reference to the URL. Do not include the URL in the body text of the PEP. E.g. Refer to the Python Language web site [1] for more details. ... [1] http://www.python.org When referring to another PEP, include the PEP number in the body text, such as "PEP 1". The title may optionally appear. Add a footnote reference that includes the PEP's title and author. It may optionally include the explicit URL on a separate line, but only in the References section. Note that the pep2html.py script will calculate URLs automatically, e.g.: ... Refer to PEP 1 [7] for more information about PEP style ... References [7] PEP 1, PEP Purpose and Guidelines, Warsaw, Hylton http://www.python.org/peps/pep-0001.html If you decide to provide an explicit URL for a PEP, please use this as the URL template: http://www.python.org/peps/pep-xxxx.html PEP numbers in URLs must be padded with zeros from the left, so as to be exactly 4 characters wide, however PEP numbers in text are never padded. Reporting PEP Bugs, or Submitting PEP Updates How you report a bug, or submit a PEP update depends on several factors, such as the maturity of the PEP, the preferences of the PEP author, and the nature of your comments. For the early draft stages of the PEP, it's probably best to send your comments and changes directly to the PEP author. For more mature, or finished PEPs you may want to submit corrections to the SourceForge bug manager[6] or better yet, the SourceForge patch manager[2] so that your changes don't get lost. If the PEP author is a SF developer, assign the bug/patch to him, otherwise assign it to the PEP editor. When in doubt about where to send your changes, please check first with the PEP author and/or PEP editor. PEP authors who are also SF committers, can update the PEPs themselves by using "cvs commit" to commit their changes. Remember to also push the formatted PEP text out to the web by doing the following: % python pep2html.py -i NUM where NUM is the number of the PEP you want to push out. See % python pep2html.py --help for details. Transferring PEP Ownership It occasionally becomes necessary to transfer ownership of PEPs to a new champion. In general, we'd like to retain the original author as a co-author of the transferred PEP, but that's really up to the original author. A good reason to transfer ownership is because the original author no longer has the time or interest in updating it or following through with the PEP process, or has fallen off the face of the 'net (i.e. is unreachable or not responding to email). A bad reason to transfer ownership is because you don't agree with the direction of the PEP. We try to build consensus around a PEP, but if that's not possible, you can always submit a competing PEP. If you are interested assuming ownership of a PEP, send a message asking to take over, addressed to both the original author and the PEP editor <peps(a)python.org>. If the original author doesn't respond to email in a timely manner, the PEP editor will make a unilateral decision (it's not like such decisions can be reversed. :). References and Footnotes [1] This historical record is available by the normal CVS commands for retrieving older revisions. For those without direct access to the CVS tree, you can browse the current and past PEP revisions via the SourceForge web site at http://cvs.sourceforge.net/cgi-bin/cvsweb.cgi/python/nondist/peps/?cvsroot=… [2] http://sourceforge.net/tracker/?group_id=5470&atid=305470 [3] http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse [4] http://www.opencontent.org/openpub/ [5] The script referred to here is pep2html.py, which lives in the same directory in the CVS tree as the PEPs themselves. Try "pep2html.py --help" for details. The URL for viewing PEPs on the web is http://www.python.org/peps/ [6] http://sourceforge.net/tracker/?group_id=5470&atid=305470 [7] PEP 9, Sample PEP Template http://www.python.org/peps/pep-0009.html Copyright This document has been placed in the public domain. Local Variables: mode: indented-text indent-tabs-mode: nil sentence-end-double-space: t fill-column: 70 End:

8 14

Boundaries between numbers and identifiers
by Serhiy Storchaka 15 Apr '21

15 Apr '21

In Python 2.5 `0or[]` was accepted by the Python parser. It became an error in 2.6 because "0o" became recognizing as an incomplete octal number. `1or[]` still is accepted. On other hand, `1if 2else 3` is accepted despites the fact that "2e" can be recognized as an incomplete floating point number. In this case the tokenizer pushes "e" back and returns "2". Shouldn't it do the same with "0o"? It is possible to make `0or[]` be parseable again. Python implementation is able to tokenize this example: $ echo '0or[]' | ./python -m tokenize 1,0-1,1: NUMBER '0' 1,1-1,3: NAME 'or' 1,3-1,4: OP '[' 1,4-1,5: OP ']' 1,5-1,6: NEWLINE '\n' 2,0-2,0: ENDMARKER '' On other hand, all these examples look weird. There is an assymmetry: `1or 2` is a valid syntax, but `1 or2` is not. It is hard to recognize visually the boundary between a number and the following identifier or keyword, especially if numbers can contain letters ("b", "e", "j", "o", "x") and underscores, and identifiers can contain digits. On both sides of the boundary can be letters, digits, and underscores. I propose to change the Python syntax by adding a requirement that there should be a whitespace or delimiter between a numeric literal and the following keyword.

8 10

pathlib.Path: inconsistent symlink_to() and link_to()
by Barney Gale 22 Jan '21

22 Jan '21

Hi, Pathlib's symlink_to() and link_to() methods have different argument orders, so: a.symlink_to(b) # Creates a symlink from A to B a.link_to(b) # Creates a hard link from B to A I don't think link_to() was intended to be implemented this way, as the docs say "Create a hard link pointing to a path named target.". It's also inconsistent with everything else in pathlib, most obviously symlink_to(). Bug report here: https://bugs.python.org/issue39291 This /really/ irks me. Apparently it's too late to fix link_to(), so I'd like to suggest we add a new hardlink_to() method that matches the symlink_to() argument order. link_to() then becomes deprecated/undocumented. Any thoughts? Barney

4 5

Summary of Python tracker Issues
by Python tracker 05 Jun '20

05 Jun '20

ACTIVITY SUMMARY (2020-05-22 - 2020-05-29) Python tracker at https://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 7487 ( +9) closed 45080 (+80) total 52567 (+89) Open issues with patches: 3011 Issues opened (58) ================== #39343: Travis CI: documentation job fails in library/nntplib.rst with https://bugs.python.org/issue39343 reopened by chris.jerdonek #40133: Provide additional matchers for unittest.mock https://bugs.python.org/issue40133 reopened by gregory.p.smith #40733: Make IDLE doc more visible, mention in main python docs page https://bugs.python.org/issue40733 opened by phr #40734: /usr/bin surprisingly in sys.path under IDLE https://bugs.python.org/issue40734 opened by phr #40735: test_nntplib: sporadic failures, NetworkedNNTP_SSLTests.test_w https://bugs.python.org/issue40735 opened by chris.jerdonek #40736: better message for re.search TypeError ("expected string or by https://bugs.python.org/issue40736 opened by chris.jerdonek #40739: find_library broken for binutils >= 2.32 / 2.34 https://bugs.python.org/issue40739 opened by Frederik Rietdijk #40741: Upgrade to SQLite v3.32.1 in Windows and macOS builds https://bugs.python.org/issue40741 opened by erlendaasland #40742: Doc: Parallel build break audit table https://bugs.python.org/issue40742 opened by mdk #40743: [CMake] It's 2020, where is CMake? https://bugs.python.org/issue40743 opened by TheUltimatePineapple #40744: Explicitly drop support for SQLite version < 3.7.3 https://bugs.python.org/issue40744 opened by erlendaasland #40745: Typo in library/typing https://bugs.python.org/issue40745 opened by hectorcanto #40746: test_gdb failing on Raspbian on 3.9, regression from 3.8 https://bugs.python.org/issue40746 opened by gregory.p.smith #40747: sysconfig.get_config_var("py_version_nodot") should return 3_1 https://bugs.python.org/issue40747 opened by mattip #40748: Tutorial 4.7 More on Defining Functions missing screen prompts https://bugs.python.org/issue40748 opened by Chas Belov #40749: Consider adding decorator for required inner class https://bugs.python.org/issue40749 opened by Elijah Rippeth #40754: ModuleNotFoundError: No module named '_testinternalcapi' under https://bugs.python.org/issue40754 opened by honglei.jiang #40756: Second argument of LoggerAdapter.__init__ should default to No https://bugs.python.org/issue40756 opened by arturoescaip #40757: tarfile: ignore_zeros = True won't raise exception even on inv https://bugs.python.org/issue40757 opened by mxmlnkn #40758: For 7.2.7. Code Examples, distinguish between the Tutorial and https://bugs.python.org/issue40758 opened by Chas Belov #40759: Deprecate the symbol module https://bugs.python.org/issue40759 opened by BTaskaya #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 opened by sidhant #40763: zipfile.extractall is safe by now https://bugs.python.org/issue40763 opened by VA #40766: Add support for SQLITE_DIRECTONLY and SQLITE_INNOCUOUS for use https://bugs.python.org/issue40766 opened by erlendaasland #40767: Allow pure Wayland to get default XDG webbrowser https://bugs.python.org/issue40767 opened by Jeremy Attali #40769: Pegen: cover extra surrounding parentheses for invalid annotat https://bugs.python.org/issue40769 opened by BTaskaya #40770: RFE: Run linkchecker on documentation on the CI https://bugs.python.org/issue40770 opened by hroncok #40771: python3 fromtimestamp generates OSError https://bugs.python.org/issue40771 opened by jamercee #40772: module 'resource' has no attribute 'RLIMIT_VMEM' https://bugs.python.org/issue40772 opened by Titusz Ban #40773: DOC: Fix rendering for 'retval' on the pdb page https://bugs.python.org/issue40773 opened by cheryl.sabella #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 opened by erlendaasland #40777: _datetimemodule.c:3328:16: error: initializer element is not c https://bugs.python.org/issue40777 opened by smani #40782: AbstactEventLoop.run_in_executor is listed as an async method, https://bugs.python.org/issue40782 opened by jamesba #40785: `mmap.mmap(..., 0)` doesn't work as advertised in docs (fails https://bugs.python.org/issue40785 opened by ngie #40786: madvise should be accessible outside of mmap instance https://bugs.python.org/issue40786 opened by ngie #40788: Build issue Solaris 10 Sparc https://bugs.python.org/issue40788 opened by munocat #40791: hmac.compare_digest could try harder to be constant-time. https://bugs.python.org/issue40791 opened by Devin Jeanpierre #40794: dataclass signatures and docstrings w/future-annotations https://bugs.python.org/issue40794 opened by BTaskaya #40797: multiprocessing.Semaphore has undocumented get_value() method https://bugs.python.org/issue40797 opened by remi.lapeyre #40798: The deprecated-removed Sphinx extension need to change the err https://bugs.python.org/issue40798 opened by remi.lapeyre #40799: Create Lib/_pydatetime.py file to optimize "import datetime" w https://bugs.python.org/issue40799 opened by vstinner #40800: asyncio.sleep(0) should "yield" back to the event loop, but it https://bugs.python.org/issue40800 opened by Davy Durham #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 opened by mark.dickinson #40802: AbstractEventLoop.shutdown_default_executor breaks backwards c https://bugs.python.org/issue40802 opened by petr.viktorin #40804: Bug report in python3.6.8 using argparse module https://bugs.python.org/issue40804 opened by amansi26 #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 opened by Rob Taft #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 opened by cheryl.sabella #40808: test_venv fails with HOME=/ on AMD64 FreeBSD Non-Debug 3.x https://bugs.python.org/issue40808 opened by vstinner #40810: sqlite3 test CheckTraceCallbackContent fails for sqlite v3.7.3 https://bugs.python.org/issue40810 opened by erlendaasland #40811: Allow to create new Event Loops on Threads https://bugs.python.org/issue40811 opened by Christian Exposito #40813: Output SyntaxError is not defective https://bugs.python.org/issue40813 opened by timofej #40814: Update typing module documentation based on PEP 585 https://bugs.python.org/issue40814 opened by Matúš Valo #40815: Multiprocessing docs don't describe thread-safety https://bugs.python.org/issue40815 opened by bjs #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 opened by heckad #40817: Document the asyncio shell https://bugs.python.org/issue40817 opened by remi.lapeyre #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 opened by remi.lapeyre #40819: Idle Context Menu Copy/Cut Grayed Out https://bugs.python.org/issue40819 opened by BevInTX #40820: Mock Call attributes args and kwargs have no changeversion https://bugs.python.org/issue40820 opened by Andrius Gobis Most recent 15 issues with no replies (15) ========================================== #40820: Mock Call attributes args and kwargs have no changeversion https://bugs.python.org/issue40820 #40819: Idle Context Menu Copy/Cut Grayed Out https://bugs.python.org/issue40819 #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 #40815: Multiprocessing docs don't describe thread-safety https://bugs.python.org/issue40815 #40814: Update typing module documentation based on PEP 585 https://bugs.python.org/issue40814 #40808: test_venv fails with HOME=/ on AMD64 FreeBSD Non-Debug 3.x https://bugs.python.org/issue40808 #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 #40805: Can no longer patch flask.g https://bugs.python.org/issue40805 #40802: AbstractEventLoop.shutdown_default_executor breaks backwards c https://bugs.python.org/issue40802 #40800: asyncio.sleep(0) should "yield" back to the event loop, but it https://bugs.python.org/issue40800 #40797: multiprocessing.Semaphore has undocumented get_value() method https://bugs.python.org/issue40797 #40788: Build issue Solaris 10 Sparc https://bugs.python.org/issue40788 #40786: madvise should be accessible outside of mmap instance https://bugs.python.org/issue40786 #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 Most recent 15 issues waiting for review (15) ============================================= #40818: Run sys.__interactivehook__ for asyncio REPLs https://bugs.python.org/issue40818 #40816: Add missed AsyncContextDecorator to contextlib https://bugs.python.org/issue40816 #40811: Allow to create new Event Loops on Threads https://bugs.python.org/issue40811 #40810: sqlite3 test CheckTraceCallbackContent fails for sqlite v3.7.3 https://bugs.python.org/issue40810 #40807: CODEOP: Show warnings once during _maybe_compile https://bugs.python.org/issue40807 #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 #40799: Create Lib/_pydatetime.py file to optimize "import datetime" w https://bugs.python.org/issue40799 #40798: The deprecated-removed Sphinx extension need to change the err https://bugs.python.org/issue40798 #40791: hmac.compare_digest could try harder to be constant-time. https://bugs.python.org/issue40791 #40777: _datetimemodule.c:3328:16: error: initializer element is not c https://bugs.python.org/issue40777 #40775: Fix missing dot in sqlite3 Node type name https://bugs.python.org/issue40775 #40769: Pegen: cover extra surrounding parentheses for invalid annotat https://bugs.python.org/issue40769 #40767: Allow pure Wayland to get default XDG webbrowser https://bugs.python.org/issue40767 #40766: Add support for SQLITE_DIRECTONLY and SQLITE_INNOCUOUS for use https://bugs.python.org/issue40766 #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 Top 10 most discussed issues (10) ================================= #40762: Writing bytes using CSV module results in b prefixed strings https://bugs.python.org/issue40762 15 msgs #30064: BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their https://bugs.python.org/issue30064 13 msgs #40794: dataclass signatures and docstrings w/future-annotations https://bugs.python.org/issue40794 11 msgs #38605: [typing] PEP 563: Postponed evaluation of annotations: enable https://bugs.python.org/issue38605 10 msgs #40701: tempfile mixes str and bytes in an inconsistent manner https://bugs.python.org/issue40701 10 msgs #40801: Expose PyFloat_AsDouble at Python level: operator.as_float? https://bugs.python.org/issue40801 9 msgs #40217: The garbage collector doesn't take in account that objects of https://bugs.python.org/issue40217 8 msgs #40748: Tutorial 4.7 More on Defining Functions missing screen prompts https://bugs.python.org/issue40748 8 msgs #2897: PyMemberDef missing in limited API / Deprecate structmember.h https://bugs.python.org/issue2897 7 msgs #40275: test.support has way too many imports https://bugs.python.org/issue40275 7 msgs Issues closed (78) ================== #13097: [easy C issue] ctypes: segfault with large number of callback https://bugs.python.org/issue13097 closed by vstinner #14562: urllib2 maybe blocks too long with small chunks https://bugs.python.org/issue14562 closed by benjamin.peterson #17050: argparse.REMAINDER doesn't work as first argument https://bugs.python.org/issue17050 closed by rhettinger #23082: pathlib relative_to() can give confusing error message https://bugs.python.org/issue23082 closed by steve.dower #23721: Set up a daily test coverage run https://bugs.python.org/issue23721 closed by brett.cannon #25247: Tkinter modules built successfully but removed because they co https://bugs.python.org/issue25247 closed by ned.deily #25920: PyOS_AfterFork should reset socketmodule's lock https://bugs.python.org/issue25920 closed by vstinner #26415: Excessive peak memory consumption by the Python parser https://bugs.python.org/issue26415 closed by pablogsal #29882: Add an efficient popcount method for integers https://bugs.python.org/issue29882 closed by mark.dickinson #30986: Add --include-py argument to Tools/msi/make_zip.py https://bugs.python.org/issue30986 closed by cheryl.sabella #32398: OSX C++ linking workaround in distutils breaks other packages https://bugs.python.org/issue32398 closed by cheryl.sabella #33111: Merely importing tkinter breaks parallel code (multiprocessing https://bugs.python.org/issue33111 closed by ned.deily #33388: Support PEP 566 metadata in distutils https://bugs.python.org/issue33388 closed by eric.araujo #34397: remove redundant overflow checks in tuple and list implementat https://bugs.python.org/issue34397 closed by cheryl.sabella #35545: asyncio.base_events.create_connection doesn't handle scoped IP https://bugs.python.org/issue35545 closed by cheryl.sabella #36290: _ast.ast_type_init does not handle args and kwargs correctly. https://bugs.python.org/issue36290 closed by pablogsal #37129: Add os.RWF_APPEND flag for os.pwritev https://bugs.python.org/issue37129 closed by vstinner #37218: Default hmac.new() digestmod has not been removed from documen https://bugs.python.org/issue37218 closed by cheryl.sabella #37973: improve docstrings of sys.float_info https://bugs.python.org/issue37973 closed by mark.dickinson #37999: No longer use implicit convertion to int with loss https://bugs.python.org/issue37999 closed by serhiy.storchaka #38580: select()'s documentation claims only sequences are accepted, b https://bugs.python.org/issue38580 closed by taleinat #39244: multiprocessing.get_all_start_methods() wrong default on macOS https://bugs.python.org/issue39244 closed by taleinat #39685: Python 3.8 regression Socket operation on non-socket https://bugs.python.org/issue39685 closed by christian.heimes #39686: add dump_json to ast module https://bugs.python.org/issue39686 closed by cheryl.sabella #40160: documentation example of os.walk should be less destructive https://bugs.python.org/issue40160 closed by serhiy.storchaka #40327: list(sys.modules.items()) can throw RuntimeError: dictionary c https://bugs.python.org/issue40327 closed by rhettinger #40367: ImportError: libffi.so.6 https://bugs.python.org/issue40367 closed by YoSTEALTH #40373: urlunparse does not escape slash (/) for http+unix:// in netlo https://bugs.python.org/issue40373 closed by taleinat #40439: Error in an external reference https://bugs.python.org/issue40439 closed by cheryl.sabella #40474: Code coverage report not entirely accurate https://bugs.python.org/issue40474 closed by brett.cannon #40552: Enhance for loop and copy example in tutorial https://bugs.python.org/issue40552 closed by nanjekyejoannah #40558: update CONTRIBUTING.rst docs https://bugs.python.org/issue40558 closed by zach.ware #40586: Pydoc should support https for hyperlinks. https://bugs.python.org/issue40586 closed by cheryl.sabella #40611: Add MAP_POPULATE to the mmap library https://bugs.python.org/issue40611 closed by vstinner #40646: Builtins in doc show signature in documentation https://bugs.python.org/issue40646 closed by terry.reedy #40654: shutil.copyfile mutates symlink for absolute path https://bugs.python.org/issue40654 closed by steve.dower #40663: Wrong generated annotation on subscripting https://bugs.python.org/issue40663 closed by pablogsal #40667: [Windows] Add global python and python3 commands https://bugs.python.org/issue40667 closed by steve.dower #40678: Full list of Python lexical rules https://bugs.python.org/issue40678 closed by cool-RR #40679: show class name in method invocation TypeError https://bugs.python.org/issue40679 closed by chris.jerdonek #40688: PEG Generator: Fix scripts to always use the correct parser https://bugs.python.org/issue40688 closed by lys.nikolaou #40719: Add pt-br to the language switcher at the Python 3.6 and 2.7 d https://bugs.python.org/issue40719 closed by rffontenelle #40722: test_ttk_guionly times out on Ubuntu CI https://bugs.python.org/issue40722 closed by terry.reedy #40730: Odd sentence in 3.9 What's New https://bugs.python.org/issue40730 closed by eric.smith #40731: CWI url's protocol on LICENSE file from http to https https://bugs.python.org/issue40731 closed by gvanrossum #40732: New realpath breaks setuptools_scm https://bugs.python.org/issue40732 closed by jaraco #40737: Fix possible reference leak for sqlite3 initialization https://bugs.python.org/issue40737 closed by corona10 #40738: backspace character \b not processed by IDLE https://bugs.python.org/issue40738 closed by terry.reedy #40740: Missing api-ms-win-core-path-l1-1.0.dll for python-3.9.0b1-amd https://bugs.python.org/issue40740 closed by steve.dower #40750: Support -d flag in the new parser https://bugs.python.org/issue40750 closed by pablogsal #40751: command 'elif' does not work https://bugs.python.org/issue40751 closed by terry.reedy #40752: Implement PurePath.__len__ https://bugs.python.org/issue40752 closed by serhiy.storchaka #40753: Remove Python 2 compatibility code from pathlib https://bugs.python.org/issue40753 closed by brett.cannon #40755: Add missing multiset predicates to collections.Counter https://bugs.python.org/issue40755 closed by rhettinger #40760: Dictionary comprehension using older division behavior https://bugs.python.org/issue40760 closed by Amol Sharma #40761: unittest.TestCase.assertTrue return True even if the expr is F https://bugs.python.org/issue40761 closed by zach.ware #40764: Conflation of Counter with Multiset https://bugs.python.org/issue40764 closed by rhettinger #40765: clear screen in idle https://bugs.python.org/issue40765 closed by terry.reedy #40768: pyaudio https://bugs.python.org/issue40768 closed by SilentGhost #40774: "Important" block in documentation of asyncio.create_subproces https://bugs.python.org/issue40774 closed by benjamin.peterson #40776: Python 3.7.6 installation issue on mac os x 10.6.8 https://bugs.python.org/issue40776 closed by ned.deily #40778: Updating Py_REFCNT and Py_SIZE to use _PyObject_CAST_CONS https://bugs.python.org/issue40778 closed by corona10 #40779: incorrect end column for single argument generator function ca https://bugs.python.org/issue40779 closed by pablogsal #40780: float.__format__() handles trailing zeros inconsistently in � https://bugs.python.org/issue40780 closed by mark.dickinson #40781: Remove sys._debugmallocstats() function and PYTHONMALLOCSTATS https://bugs.python.org/issue40781 closed by vstinner #40783: test_interpreters test_interpreters leaked [216, 216, 216] ref https://bugs.python.org/issue40783 closed by pablogsal #40784: test_sqlite: CheckFuncDeterministic() fails with SQLite 3.32 https://bugs.python.org/issue40784 closed by berker.peksag #40787: Mysql + unittest crash https://bugs.python.org/issue40787 closed by lgerosa #40789: C-level destructor in PySide2 breaks gen_send_ex, which assume https://bugs.python.org/issue40789 closed by njs #40790: Python should enable computed gotos on Mac by default https://bugs.python.org/issue40790 closed by benjamin.peterson #40792: Make PyNumber_Index() always returning an exact int instance https://bugs.python.org/issue40792 closed by serhiy.storchaka #40793: print() performance problem with very large numbers https://bugs.python.org/issue40793 closed by mark.dickinson #40795: ctypes: PyErr_WriteUnraisable() called with no exception set o https://bugs.python.org/issue40795 closed by vstinner #40796: dataclasses.make_dataclass: Exception when called with differe https://bugs.python.org/issue40796 closed by Darrick Yee #40803: Unable to execute python.exe from zip in wine https://bugs.python.org/issue40803 closed by clanmills #40806: itertools.product not lazy https://bugs.python.org/issue40806 closed by rhettinger #40809: list.Count() isn't working as expected for the series of same https://bugs.python.org/issue40809 closed by steven.daprano #40812: _tkinter build failed when install Python-3.6.10 https://bugs.python.org/issue40812 closed by ned.deily

2 1

PEP 618: Add Optional Length-Checking To zip
by Brandt Bucher 02 Jun '20

02 Jun '20

I have pushed a second draft of PEP 618: https://www.python.org/dev/peps/pep-0618 Please let me know what you think – I'd love to hear any new feedback that hasn't yet been addressed in the PEP! Brandt

23 60

Repr: where to place the address and additional info?
by Serhiy Storchaka 01 Jun '20

01 Jun '20

The default repr of Python object is formatted using the following pattern: <{typename} object at {address:#x}> And many custom reprs use similar patterns, but add some additional type specific information. The type name first, followed by details and address. All is surrounded by angle quotes. The question is in what order to show address and other details? Should the address be at rear or in the middle? <{typename} {details} at {address:#x}> <{typename} at {address:#x} {details}> There are examples of both ways in the stdlib. I am going to add new custom reprs [1] and need to know what pattern looks better. Also, is "object" mandatory after the type name? <{typename} object {details} at {address:#x}> <{typename} object at {address:#x} {details}> [1] https://bugs.python.org/issue24391

5 4

PEG parser and raw strings
by Vito De Tullio 29 May '20

29 May '20

Hi. Just a question about the new PEG parser: will it support lone slash in raw strings? the fact that r'\' doesn't work as expected it's a strange exception to remember.

5 4

Map errno==ETIME to TimeoutError
by Eric V. Smith 27 May '20

27 May '20

Does anyone have an opinion on https://bugs.python.org/issue39673? It maps ETIME to TimeoutError, in addition to the already existing ETIMEDOUT. http://man7.org/linux/man-pages/man3/errno.3.html says: *ETIME *Timer expired (POSIX.1 (XSI STREAMS option)). (POSIX.1 says "STREAMioctl(2) <http://man7.org/linux/man-pages/man2/ioctl.2.html> timeout".) *ETIMEDOUT *Connection timed out (POSIX.1-2001). It seems like a reasonable change to me, but I'm not a subject matter expert on STREAMS, or what other affect this might have. And if added to 3.10, should it be backported? I'd tend to say "no", because of unknown impacts on existing code. Eric

8 12

Summary of Python tracker Issues
by Python tracker 22 May '20

22 May '20

ACTIVITY SUMMARY (2020-05-15 - 2020-05-22) Python tracker at https://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 7478 (+10) closed 45000 (+83) total 52478 (+93) Open issues with patches: 3006 Issues opened (66) ================== #26317: _scproxy and Python Launcher fail to build wtih GNU gcc on mac https://bugs.python.org/issue26317 reopened by vstinner #38815: test_ssl: test_min_max_version() fails on FreeBSD and Fedora https://bugs.python.org/issue38815 reopened by christian.heimes #40217: The garbage collector doesn't take in account that objects of https://bugs.python.org/issue40217 reopened by pablogsal #40452: Tkinter/IDLE: preserve clipboard on closure https://bugs.python.org/issue40452 reopened by taleinat #40636: Provide a strict form of zip (PEP-618) requiring same length i https://bugs.python.org/issue40636 opened by gregory.p.smith #40638: input() with malformed input stream triggers assertion failure https://bugs.python.org/issue40638 opened by tekknolagi #40640: Tutorial for Continue missing ... line https://bugs.python.org/issue40640 opened by docorbit(a)sonic.net #40642: Cpython "pystate.h" subdirectory wrong https://bugs.python.org/issue40642 opened by jpelizza #40643: Improve doc-strings for datetime.strftime & strptime https://bugs.python.org/issue40643 opened by edison.abahurire #40644: Text representation of Windows' file attributes similar to sta https://bugs.python.org/issue40644 opened by scrool #40645: Use OpenSSL's HMAC API https://bugs.python.org/issue40645 opened by christian.heimes #40646: Builtins in doc show signature in documentation https://bugs.python.org/issue40646 opened by cryvate #40647: Building with a libreadline.so located outside the ld.so.conf https://bugs.python.org/issue40647 opened by mjpieters #40648: File mode is not tested on Windows https://bugs.python.org/issue40648 opened by scrool #40652: Test test_locale failed when running cpython test on Windows 1 https://bugs.python.org/issue40652 opened by kpysoze #40654: shutil.copyfile mutates symlink for absolute path https://bugs.python.org/issue40654 opened by jaraco #40656: Clean up detect_socket() in setup.py https://bugs.python.org/issue40656 opened by erlendaasland #40657: Resource leaks with threading.Thread https://bugs.python.org/issue40657 opened by POCEH #40663: Wrong generated annotation on subscripting https://bugs.python.org/issue40663 opened by BTaskaya #40666: TarFile.add does not support pathlib.Path as a value to first https://bugs.python.org/issue40666 opened by socketpair #40667: [Windows] Add global python and python3 commands https://bugs.python.org/issue40667 opened by steve.dower #40668: Catastrophic loss of precision in colorsys module https://bugs.python.org/issue40668 opened by Zac Hatfield-Dodds #40670: supplying an empty string to timeit causes an IndentationError https://bugs.python.org/issue40670 opened by edison.abahurire #40671: Convert _hashlib to PEP 489 multiphase initialization https://bugs.python.org/issue40671 opened by vstinner #40672: asyncio.wait_for: process future result produced during cancel https://bugs.python.org/issue40672 opened by Roman Skurikhin #40673: urllib.request.URLopener raises different exceptions based on https://bugs.python.org/issue40673 opened by Petter S #40674: Deprecate urllib.request.urlretrieve() and cleanup() https://bugs.python.org/issue40674 opened by remi.lapeyre #40675: Add missing mimetypes for fonts https://bugs.python.org/issue40675 opened by sahil.prajapati #40676: Use Argument Clinic for csv https://bugs.python.org/issue40676 opened by hauntsaninja #40678: Full list of Python lexical rules https://bugs.python.org/issue40678 opened by cool-RR #40679: show class name in method invocation TypeError https://bugs.python.org/issue40679 opened by chris.jerdonek #40680: thread_cputime isn't supported by AIX5 https://bugs.python.org/issue40680 opened by Michael.Felt #40684: make install doesn't respect configure --with-platlibdir=lib64 https://bugs.python.org/issue40684 opened by vstinner #40685: IDLE: Document info needed for 'not working' reports. https://bugs.python.org/issue40685 opened by Coder436 #40686: Compiler warnings in _zoneinfo.c on Windows build in 64-bit https://bugs.python.org/issue40686 opened by vstinner #40687: Windows py.exe launcher interacts badly with Windows store pyt https://bugs.python.org/issue40687 opened by benspiller #40688: PEG Generator: Fix scripts to always use the correct parser https://bugs.python.org/issue40688 opened by lys.nikolaou #40689: The only supported minidom attribute iteration (NamedNodeMap) https://bugs.python.org/issue40689 opened by nthykier #40690: unittest: if FunctionTestCase is imported, the loader loads "t https://bugs.python.org/issue40690 opened by pwtail #40691: misleading output from difflib unified_diff https://bugs.python.org/issue40691 opened by cdanis #40692: Adjust test_concurrent_futures to run more of its tests if mul https://bugs.python.org/issue40692 opened by asheesh #40694: gen.throw() with multiple yield froms skips intermediate excep https://bugs.python.org/issue40694 opened by chris.jerdonek #40695: hashlib: OpenSSL hash detection should obey security policy https://bugs.python.org/issue40695 opened by christian.heimes #40696: Exception handling with "await" can hang in Python3.9.0b1 https://bugs.python.org/issue40696 opened by felixxm #40697: add fissix as a lib2to3 alternative https://bugs.python.org/issue40697 opened by graingert #40699: Memory leak in threading library with Python 3.6-3.8 https://bugs.python.org/issue40699 opened by Cristian Martinez de Morentin #40700: Make WSGIRequestHandler easier to be customized by the user https://bugs.python.org/issue40700 opened by Manjusaka #40701: tempfile mixes str and bytes in an inconsistent manner https://bugs.python.org/issue40701 opened by ericzolf #40703: PyType_FromSpec*() overwrites the type's "__module__" https://bugs.python.org/issue40703 opened by scoder #40704: PyIter_Check fails when compiling in the Limited API https://bugs.python.org/issue40704 opened by tekknolagi #40705: use-after-free in _zoneinfo.c's module_free function https://bugs.python.org/issue40705 opened by ammar2 #40706: Unreachable code in _PyEval_EvalCode https://bugs.python.org/issue40706 opened by Dennis Sweeney #40707: Popen.communicate documentation does not say how to get the re https://bugs.python.org/issue40707 opened by gdr(a)garethrees.org #40717: pl.python.org has expired cert and links to nonexistent django https://bugs.python.org/issue40717 opened by hanno #40718: Support out-of-band pickling for builtin types https://bugs.python.org/issue40718 opened by jakirkham #40719: Add pt-br to the language switcher at the Python 3.6 and 2.7 d https://bugs.python.org/issue40719 opened by rffontenelle #40720: accessing mmap of file that is overwritten causes bus error https://bugs.python.org/issue40720 opened by mhvk #40721: PEP0435 (enums) -- there is no standard on enum item letters c https://bugs.python.org/issue40721 opened by socketpair #40722: test_ttk_guionly times out on Ubuntu CI https://bugs.python.org/issue40722 opened by Dennis Sweeney #40723: IDLE: make autocomplete test run without __main__.__file__ https://bugs.python.org/issue40723 opened by terry.reedy #40724: Support buffer protocol with type specs https://bugs.python.org/issue40724 opened by scoder #40726: ast.Call end_lineno is defined and returns None https://bugs.python.org/issue40726 opened by gaborbernat #40727: SSLContext.load_verify_locations leaks memory on Linux in asyn https://bugs.python.org/issue40727 opened by Recursing #40729: Update the list of auto-generated files in .gitattributes https://bugs.python.org/issue40729 opened by BTaskaya #40730: Odd sentence in 3.9 What's New https://bugs.python.org/issue40730 opened by eric.smith #40731: CWI url's protocol on LICENSE file from http to https https://bugs.python.org/issue40731 opened by bastosvinicius Most recent 15 issues with no replies (15) ========================================== #40729: Update the list of auto-generated files in .gitattributes https://bugs.python.org/issue40729 #40724: Support buffer protocol with type specs https://bugs.python.org/issue40724 #40722: test_ttk_guionly times out on Ubuntu CI https://bugs.python.org/issue40722 #40720: accessing mmap of file that is overwritten causes bus error https://bugs.python.org/issue40720 #40719: Add pt-br to the language switcher at the Python 3.6 and 2.7 d https://bugs.python.org/issue40719 #40718: Support out-of-band pickling for builtin types https://bugs.python.org/issue40718 #40707: Popen.communicate documentation does not say how to get the re https://bugs.python.org/issue40707 #40706: Unreachable code in _PyEval_EvalCode https://bugs.python.org/issue40706 #40703: PyType_FromSpec*() overwrites the type's "__module__" https://bugs.python.org/issue40703 #40700: Make WSGIRequestHandler easier to be customized by the user https://bugs.python.org/issue40700 #40699: Memory leak in threading library with Python 3.6-3.8 https://bugs.python.org/issue40699 #40695: hashlib: OpenSSL hash detection should obey security policy https://bugs.python.org/issue40695 #40694: gen.throw() with multiple yield froms skips intermediate excep https://bugs.python.org/issue40694 #40692: Adjust test_concurrent_futures to run more of its tests if mul https://bugs.python.org/issue40692 #40691: misleading output from difflib unified_diff https://bugs.python.org/issue40691 Most recent 15 issues waiting for review (15) ============================================= #40731: CWI url's protocol on LICENSE file from http to https https://bugs.python.org/issue40731 #40730: Odd sentence in 3.9 What's New https://bugs.python.org/issue40730 #40729: Update the list of auto-generated files in .gitattributes https://bugs.python.org/issue40729 #40726: ast.Call end_lineno is defined and returns None https://bugs.python.org/issue40726 #40723: IDLE: make autocomplete test run without __main__.__file__ https://bugs.python.org/issue40723 #40719: Add pt-br to the language switcher at the Python 3.6 and 2.7 d https://bugs.python.org/issue40719 #40707: Popen.communicate documentation does not say how to get the re https://bugs.python.org/issue40707 #40705: use-after-free in _zoneinfo.c's module_free function https://bugs.python.org/issue40705 #40703: PyType_FromSpec*() overwrites the type's "__module__" https://bugs.python.org/issue40703 #40701: tempfile mixes str and bytes in an inconsistent manner https://bugs.python.org/issue40701 #40700: Make WSGIRequestHandler easier to be customized by the user https://bugs.python.org/issue40700 #40696: Exception handling with "await" can hang in Python3.9.0b1 https://bugs.python.org/issue40696 #40695: hashlib: OpenSSL hash detection should obey security policy https://bugs.python.org/issue40695 #40692: Adjust test_concurrent_futures to run more of its tests if mul https://bugs.python.org/issue40692 #40690: unittest: if FunctionTestCase is imported, the loader loads "t https://bugs.python.org/issue40690 Top 10 most discussed issues (10) ================================= #40452: Tkinter/IDLE: preserve clipboard on closure https://bugs.python.org/issue40452 22 msgs #40696: Exception handling with "await" can hang in Python3.9.0b1 https://bugs.python.org/issue40696 13 msgs #40679: show class name in method invocation TypeError https://bugs.python.org/issue40679 12 msgs #38870: Expose ast.unparse in the ast module https://bugs.python.org/issue38870 9 msgs #40654: shutil.copyfile mutates symlink for absolute path https://bugs.python.org/issue40654 9 msgs #26317: _scproxy and Python Launcher fail to build wtih GNU gcc on mac https://bugs.python.org/issue26317 8 msgs #38946: IDLE on macOS 10.15 Catalina does not open double-clicked file https://bugs.python.org/issue38946 8 msgs #40726: ast.Call end_lineno is defined and returns None https://bugs.python.org/issue40726 8 msgs #38938: Possible performance improvement for heaqq.merge() https://bugs.python.org/issue38938 7 msgs #39148: DatagramProtocol + IPv6 does not work with ProactorEventLoop https://bugs.python.org/issue39148 7 msgs Issues closed (82) ================== #4264: Patch: optimize code to use LIST_APPEND instead of calling lis https://bugs.python.org/issue4264 closed by rhettinger #13248: deprecated in 3.2/3.3, should be removed in 3.5 or ??? https://bugs.python.org/issue13248 closed by benjamin.peterson #22622: ElementTree only writes declaration when passed encoding https://bugs.python.org/issue22622 closed by scoder #24416: Have date.isocalendar() return a structseq instance https://bugs.python.org/issue24416 closed by p-ganssle #31033: Improve traceback of cancelled tasks / add cancel() msg argume https://bugs.python.org/issue31033 closed by chris.jerdonek #31131: asyncio.wait_for() TimeoutError doesn't provide full traceback https://bugs.python.org/issue31131 closed by chris.jerdonek #32309: Implement asyncio.run_in_executor shortcut https://bugs.python.org/issue32309 closed by aeros #32893: ast.literal_eval() shouldn't accept booleans as numbers in AST https://bugs.python.org/issue32893 closed by serhiy.storchaka #33797: json int encoding incorrect for dbus.Byte https://bugs.python.org/issue33797 closed by ned.deily #35569: Expose RFC 3542 IPv6 socket options on macOS https://bugs.python.org/issue35569 closed by ned.deily #35907: [security][CVE-2019-9948] Unnecessary URL scheme exists to all https://bugs.python.org/issue35907 closed by vstinner #37616: [3.10 prep] zip path incorrect https://bugs.python.org/issue37616 closed by Anthony Sottile #38544: test_venv: test_isolation() failed on AMD64 Windows7 SP1 3.x: https://bugs.python.org/issue38544 closed by vstinner #38798: test_asyncio.test_sendfile.test_sendfile_ssl_pre_and_post_data https://bugs.python.org/issue38798 closed by vstinner #39058: argparse should preserve argument ordering in Namespace https://bugs.python.org/issue39058 closed by rhettinger #39075: types.SimpleNamespace should preserve attribute ordering (?) https://bugs.python.org/issue39075 closed by eric.snow #39076: Use types.SimpleNamespace for argparse.Namespace https://bugs.python.org/issue39076 closed by rhettinger #39162: setup.py not picking up tkinter headers from non-system macOS https://bugs.python.org/issue39162 closed by ned.deily #39173: _AttributeHolder of argparse should support the sort function https://bugs.python.org/issue39173 closed by rhettinger #39305: Merge nntplib._NNTPBase and nntplib.NNTP https://bugs.python.org/issue39305 closed by corona10 #39631: Fix file association MIME type on Windows https://bugs.python.org/issue39631 closed by steve.dower #39705: Tutorial, 5.6 Looping Techniques, sorted() example https://bugs.python.org/issue39705 closed by rhettinger #39740: Select module fails to build on Solaris 11.4 https://bugs.python.org/issue39740 closed by BTaskaya #39976: Add "**other_popen_kwargs" to subprocess API signatures in doc https://bugs.python.org/issue39976 closed by chris.jerdonek #39983: test.regrtest: test marked as failed (env changed), but no war https://bugs.python.org/issue39983 closed by vstinner #40003: test.regrtest: add an option to run test.bisect_cmd on failed https://bugs.python.org/issue40003 closed by vstinner #40055: test___all__ and test_distutils alters the enviroinment: pkg_r https://bugs.python.org/issue40055 closed by vstinner #40163: multissl doesn't support tarballs in /source/old/ https://bugs.python.org/issue40163 closed by christian.heimes #40165: Hide stderror from the user if command failes https://bugs.python.org/issue40165 closed by BTaskaya #40192: time.thread_time isn't outputting in nanoseconds in AIX https://bugs.python.org/issue40192 closed by vstinner #40211: Clarify preadv and pwritev is supported AIX 7.1 and newer. https://bugs.python.org/issue40211 closed by BTaskaya #40273: mappingproxy isn't reversible https://bugs.python.org/issue40273 closed by rhettinger #40410: test_multiprocessing_forktest_terminate() timed out after 15 m https://bugs.python.org/issue40410 closed by vstinner #40425: Refleak in CDataObject https://bugs.python.org/issue40425 closed by zach.ware #40445: compileall.compile_dir docs aren't updated for bpo-38112 https://bugs.python.org/issue40445 closed by vstinner #40457: Python fails to compile/load _ssl module if OpenSSL is compile https://bugs.python.org/issue40457 closed by christian.heimes #40515: test_ssl.py hangs with SSL 1.1 built with no threads https://bugs.python.org/issue40515 closed by christian.heimes #40546: Inconsistencies between PEG parser and traceback SyntaxErrors https://bugs.python.org/issue40546 closed by lys.nikolaou #40548: Always run GitHub action jobs, even on documentation-only jobs https://bugs.python.org/issue40548 closed by vstinner #40579: Second argument to iterator.next not described https://bugs.python.org/issue40579 closed by rhettinger #40583: Runtime type annotation mutation leads to inconsistent behavio https://bugs.python.org/issue40583 closed by ethereon #40587: [regression] inspect.getdoc not returning docstring. https://bugs.python.org/issue40587 closed by terry.reedy #40590: test_subprocess stuck on Windows, x64 https://bugs.python.org/issue40590 closed by terry.reedy #40595: AttributeError from type annotation https://bugs.python.org/issue40595 closed by levkivskyi #40605: «python»: Aucun fichier ou dossier de ce type https://bugs.python.org/issue40605 closed by terry.reedy #40607: asyncio.wait_for should reraise future exception even if timeo https://bugs.python.org/issue40607 closed by chris.jerdonek #40612: Make traceback module's formatting of SyntaxError more similar https://bugs.python.org/issue40612 closed by gvanrossum #40622: Tests fail with python3.6 built with VS2019 https://bugs.python.org/issue40622 closed by ned.deily #40629: Error MSB4086 (numeric comparison) https://bugs.python.org/issue40629 closed by veganaiZe #40630: tracemalloc: allow resetting peak memory metric without touchi https://bugs.python.org/issue40630 closed by vstinner #40633: json.dumps() should encode float number NaN to null https://bugs.python.org/issue40633 closed by mark.dickinson #40637: Allow users to disable builtin hash modules on compile time https://bugs.python.org/issue40637 closed by christian.heimes #40639: Strange behavior in changing nested dictionaries https://bugs.python.org/issue40639 closed by steven.daprano #40641: Reserved word pair used in lambda tutorial without being noted https://bugs.python.org/issue40641 closed by mark.dickinson #40649: [Errno 1] https://bugs.python.org/issue40649 closed by TotallyLost #40650: Pytime.c doesn't need to include windows.h https://bugs.python.org/issue40650 closed by steve.dower #40651: class:`OrderedDict` Examples: LRU implementation has a bug. https://bugs.python.org/issue40651 closed by rhettinger #40653: _dirnameW is used outside HAVE_SYMLINK https://bugs.python.org/issue40653 closed by steve.dower #40655: Fix 'from x import *' which is bad programming practice from https://bugs.python.org/issue40655 closed by serhiy.storchaka #40661: The new parser segfaults when parsing invalid input https://bugs.python.org/issue40661 closed by pablogsal #40662: ast.get_source_segment behaviour with missing location info do https://bugs.python.org/issue40662 closed by pablogsal #40664: Documentation error: itertools.dropwhile(is_even, itertools.c https://bugs.python.org/issue40664 closed by SilentGhost #40665: Use Argument Clinic for bisect https://bugs.python.org/issue40665 closed by rhettinger #40669: PEG Parser benchmarks fail if memory_profiler is not installed https://bugs.python.org/issue40669 closed by lys.nikolaou #40677: IO_REPARSE_TAG_APPEXECLINK is not defined in old Windows SDK https://bugs.python.org/issue40677 closed by steve.dower #40681: shelve.open() should accept pathlib.Path https://bugs.python.org/issue40681 closed by serhiy.storchaka #40682: random.Random.seed() with version=1 does not consistently matc https://bugs.python.org/issue40682 closed by rhettinger #40683: Beta release does not distribute zoneinfo or test_zoneinfo https://bugs.python.org/issue40683 closed by p-ganssle #40693: pathlib.Path will be broken with os.chdir command. https://bugs.python.org/issue40693 closed by zach.ware #40698: distutils.command.upload md5_digest https://bugs.python.org/issue40698 closed by christian.heimes #40702: frozensets should not allow the |= operator https://bugs.python.org/issue40702 closed by serhiy.storchaka #40708: Clearing the screen of IDLE interactive mode in Windows https://bugs.python.org/issue40708 closed by ezio.melotti #40709: Malfunctioning of '\r' https://bugs.python.org/issue40709 closed by ezio.melotti #40710: Malfunctioning of '\r' (ii) https://bugs.python.org/issue40710 closed by ezio.melotti #40711: Clearing the screen of IDLE interactive mode in Windows https://bugs.python.org/issue40711 closed by ezio.melotti #40712: fstrings are not docstrings https://bugs.python.org/issue40712 closed by radkujawa #40713: _zoneinfo.c can use dst_offset without initialization in parse https://bugs.python.org/issue40713 closed by p-ganssle #40714: Remove compile warning from _zoneinfo.c https://bugs.python.org/issue40714 closed by corona10 #40715: Pegen: dict unpacking inside dict comprehension https://bugs.python.org/issue40715 closed by pablogsal #40716: Pegen: improve error messages for unparenthesized from imports https://bugs.python.org/issue40716 closed by pablogsal #40725: Documentation: Benchmark table in "What's new in Python 3.9" h https://bugs.python.org/issue40725 closed by rhettinger #40728: UnboundLocalError as a result of except statement variable re- https://bugs.python.org/issue40728 closed by pablogsal

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Python-Dev May 2020