Mailman 3 August 2018 - Python-Dev

Hi!
by Marko Ristin-Kaufmann 15 Aug '18

15 Aug '18

Hi python devs, Please let me briefly introduce myself. I'm Marko and live in Zurich, Switzerland. I learned Python and Django during an intership in 2007 and followed its development ever since. I did research in computer vision (at ETH Zurich). I work now at Parquery AG (Zurich, Switzerland) where we implement most of our infra-structure in Python 3. Cheers, Marko

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Can we split PEP 489 (extension module init) ?
by Stefan Behnel 13 Aug '18

13 Aug '18

Hi, coming back to PEP 489 [1], the multi-phase extension module initialization. We originally designed it as an "all or nothing" feature, but as it turns out, the "all" part is so difficult to achieve that most potential users end up with "nothing". So, my question is: could we split it up so that projects can get at least the main advantages: module spec and unicode module naming. PEP 489 is a great protocol in the sense that it allows extension modules to set themselves up in the same way that Python modules do: load, create module, execute module code. Without it, creating the module and executing its code are a single step that is outside of the control of CPython, which prevents the module from knowing its metadata and CPython from knowing up-front what the module will actually be. Now, the problem with PEP 489 is that it requires support for reloading and subinterpreters at the same time [2]. For this, extension modules must essentially be free of static global state, which comprises both the module code itself and any external native libraries that it uses. That is somewhere between difficult and impossible to achieve. PEP 573 [3] explains some of the reasons, and lists solutions for some of the issues, but cannot solve the general problem that some extension modules simply cannot get rid of their global state, and are therefore inherently incompatible with reloading and subinterpreters. I would like the requirement in [2] to be lifted in PEP 489, to make the main features of the PEP generally available to all extension modules. The question is then how to opt out of the subinterpreter support. The PEP explicitly does not allow backporting new init slot functions/feeatures: "Unknown slot IDs will cause the import to fail with SystemError." But at least changing this in Py3.8 should be doable and would be really nice. What do you think? Stefan [1] https://www.python.org/dev/peps/pep-0489/ [2] https://www.python.org/dev/peps/pep-0489/#subinterpreters-and-interpreter-r… [3] https://www.python.org/dev/peps/pep-0573/

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Let's change to C API!
by Victor Stinner 12 Aug '18

12 Aug '18

Hi, I just sent an email to the capi-sig mailing list. Since this mailing list was idle for months, I copy my email here to get a wider audience. But if possible, I would prefer that you join me on capi-sig to reply ;-) -- Hi, Last year, I gave a talk at the Language Summit (during Pycon) to explain that CPython should become 2x faster to remain competitive. IMHO all attempts to optimize Python (CPython forks) have failed because they have been blocked by the C API which implies strict constraints. I started to write a proposal to change the C API to hide implementation details, to prepare CPython for future changes. It allows to experimental optimization ideas without loosing support for C extensions. C extensions are a large part of the Python success. They are also the reason why PyPy didn't replace CPython yet. PyPy cpyext remains slower than CPython because PyPy has to mimick CPython which adds a significant overhead (even if PyPy developers are working *hard* to optimize it). I created a new to discuss how to introduce backward incompatible changes in the C API without breaking all C extensions: http://pythoncapi.readthedocs.io/ The source can be found at: https://github.com/vstinner/pythoncapi/ I would like to create a team of people who want to work on this project: CPython, PyPy, Cython and anyone who depends on the C API. Contact me in private if you want to be added to the GitHub project. I propose to discuss on the capi-sig mailing list since I would like to involve people from various projects, and I don't want to bother you with the high traffic of python-dev. Victor PS: I added some people as BCC ;-)

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Class decorators can't be pickled, which breaks multiprocessing and concurrent.futures. Any plans of improving this?
by Santiago Basulto 12 Aug '18

12 Aug '18

Hello folks! I'm using the `concurrent.futures.ProcessPoolExecutor` with a couple of functions that have been decorated with a class decorator. Both `concurrent.futures` and `multiprocessing` breaks because "the object's can't be pickled". There's a really simple fix for this, which is just, instead of "decorating" the function (with the @), instantiate the decorator and use it directly. Example. This is my (very simple, for demonstration purposes) decorator: class CheckOnlyIntegers: def __init__(self, fn): self.fn = fn def __call__(self, *args): if not all([type(arg) == int for arg in args]): raise ValueError("Invalid param is not an integer") return self.fn(*args) If I define a simple `add` function and decorate it using the `CheckOnlyIntegers` decorator: @CheckOnlyIntegers def add(x, y): return x + y and try using a regular `ProcessPoolExecutor().submit(add, 2, 3)`, it fails with: ``` Can't pickle <function add at 0x10ace3e18>: it's not the same object as __main__.add. ``` The fix for this is simple, instead of "decorating" the function, instantiate the class and use a different name: def add(x, y): return x + y add_2 = CheckOnlyIntegers(add) In this case `ProcessPoolExecutor().submit(add_2, 2, 3)` works correctly. (here's the full sample code <https://gist.github.com/santiagobasulto/2bc51e7b0b0c7c2a74fd6d5748778dd7>) I know this is an issue with the pickle module (not concurrent.futures or multiprocessing). But are there any ways of improving this in future versions? Not being able to pickle functions decorated with Class Decorators seems like an unnecessary limitation. Thanks for your feedback! -- Santiago Basulto.- Up!

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Re: [Python-Dev] Can we split PEP 489 (extension module init) ?
by Jeroen Demeyer 11 Aug '18

11 Aug '18

> Would this be better than a flag + raising an error on init? Exactly. PEP 489 only says "Extensions using the new initialization scheme are expected to support subinterpreters". What's wrong with raising an exception when the module is initialized the second time? Jeroen.

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Summary of Python tracker Issues
by Python tracker 10 Aug '18

10 Aug '18

ACTIVITY SUMMARY (2018-08-03 - 2018-08-10) 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 6756 ( -3) closed 39367 (+44) total 46123 (+41) Open issues with patches: 2685 Issues opened (26) ================== #34333: Path.with_suffix() raises TypeError when doing %-formatting https://bugs.python.org/issue34333 opened by berker.peksag #34334: QueueHandler logs exc_info twice https://bugs.python.org/issue34334 opened by avdd #34338: abstractmethod can run on classes https://bugs.python.org/issue34338 opened by Michael Hooreman #34340: mimetypes libmagic compatibility https://bugs.python.org/issue34340 opened by bpypy #34341: Appending to ZIP archive blows up existing Central Directory e https://bugs.python.org/issue34341 opened by serhiy.storchaka #34344: Fix the docstring for AbstractEventLoopPolicy.get_event_loop https://bugs.python.org/issue34344 opened by drtyrsa #34345: Add tests for PEP 468 and PEP 520 https://bugs.python.org/issue34345 opened by serhiy.storchaka #34346: dir() hangs interpreter https://bugs.python.org/issue34346 opened by sfaleron #34347: AIX: test_utf8_mode.test_cmd_line fails https://bugs.python.org/issue34347 opened by Michael.Felt #34349: asyncio.wait should accept generator of tasks as first argumen https://bugs.python.org/issue34349 opened by jnwatson #34354: Memory leak on _testCongestion https://bugs.python.org/issue34354 opened by Vinicius Pacheco #34355: SIGSEGV (Address boundary error) https://bugs.python.org/issue34355 opened by ybon #34356: Add support for args and kwargs in logging.conf https://bugs.python.org/issue34356 opened by xavier.hardy #34357: situation where urllib3 works, but urllib does not work https://bugs.python.org/issue34357 opened by deivid #34360: urllib.parse doesn't fully comply to RFC 3986 https://bugs.python.org/issue34360 opened by The Compiler #34362: User-created types with wrong __new__ can be instantiated https://bugs.python.org/issue34362 opened by ppperry #34363: dataclasses.asdict() mishandles dataclass instance attributes https://bugs.python.org/issue34363 opened by alexdelorenzo #34364: problem with traceback for syntax error in f-string https://bugs.python.org/issue34364 opened by bgailer #34365: datetime's documentation refers to "comparison [...] falling b https://bugs.python.org/issue34365 opened by Kevin.Norris #34366: _uuid module fails to compile on FreeBSD when libuuid is insta https://bugs.python.org/issue34366 opened by mgorny #34367: AsyncResult.get() only notifies one thread https://bugs.python.org/issue34367 opened by AlexWithBeard #34368: ftplib __init__ function can't handle 120 or 4xy reply when co https://bugs.python.org/issue34368 opened by H-ZeX #34369: kqueue.control() documentation and implementation mismatch https://bugs.python.org/issue34369 opened by a.badger #34370: Tkinter scroll issues on macOS https://bugs.python.org/issue34370 opened by vtudorache #34371: File reading gets stuck if you read at eof on macos https://bugs.python.org/issue34371 opened by sverrirab #34372: Compiler could output more accurate line numbers https://bugs.python.org/issue34372 opened by Arusekk Most recent 15 issues with no replies (15) ========================================== #34372: Compiler could output more accurate line numbers https://bugs.python.org/issue34372 #34370: Tkinter scroll issues on macOS https://bugs.python.org/issue34370 #34368: ftplib __init__ function can't handle 120 or 4xy reply when co https://bugs.python.org/issue34368 #34367: AsyncResult.get() only notifies one thread https://bugs.python.org/issue34367 #34366: _uuid module fails to compile on FreeBSD when libuuid is insta https://bugs.python.org/issue34366 #34365: datetime's documentation refers to "comparison [...] falling b https://bugs.python.org/issue34365 #34357: situation where urllib3 works, but urllib does not work https://bugs.python.org/issue34357 #34356: Add support for args and kwargs in logging.conf https://bugs.python.org/issue34356 #34354: Memory leak on _testCongestion https://bugs.python.org/issue34354 #34345: Add tests for PEP 468 and PEP 520 https://bugs.python.org/issue34345 #34344: Fix the docstring for AbstractEventLoopPolicy.get_event_loop https://bugs.python.org/issue34344 #34341: Appending to ZIP archive blows up existing Central Directory e https://bugs.python.org/issue34341 #34340: mimetypes libmagic compatibility https://bugs.python.org/issue34340 #34334: QueueHandler logs exc_info twice https://bugs.python.org/issue34334 #34333: Path.with_suffix() raises TypeError when doing %-formatting https://bugs.python.org/issue34333 Most recent 15 issues waiting for review (15) ============================================= #34366: _uuid module fails to compile on FreeBSD when libuuid is insta https://bugs.python.org/issue34366 #34341: Appending to ZIP archive blows up existing Central Directory e https://bugs.python.org/issue34341 #34333: Path.with_suffix() raises TypeError when doing %-formatting https://bugs.python.org/issue34333 #34331: Incorrectly pluralized abstract class error message https://bugs.python.org/issue34331 #34322: modification to Lib/distutils/ccompiler.py to simplify handlin https://bugs.python.org/issue34322 #34320: Creating dict from OrderedDict doesn't preserve order https://bugs.python.org/issue34320 #34319: Clarify pathlib.Path("filepath").read_text() https://bugs.python.org/issue34319 #34318: Convert deprecated behavior of assertRaises() etc into errors https://bugs.python.org/issue34318 #34311: locale.format() and locale.format_string() cast Decimals to fl https://bugs.python.org/issue34311 #34305: inspect.getsourcefile and inspect.getcomments do not work with https://bugs.python.org/issue34305 #34303: micro-optimizations in functools.reduce() https://bugs.python.org/issue34303 #34302: Avoid inefficient way to find start point in deque.index https://bugs.python.org/issue34302 #34293: DOC: Makefile inherits a Sphinx 1.5 bug regarding PAPER envvar https://bugs.python.org/issue34293 #34284: Nonsensical exception message when calling `__new__` on non-in https://bugs.python.org/issue34284 #34282: Enum._convert shadows members named _convert https://bugs.python.org/issue34282 Top 10 most discussed issues (10) ================================= #32797: Tracebacks from Cython modules no longer work https://bugs.python.org/issue32797 33 msgs #34296: Speed up python startup by pre-warming the vm https://bugs.python.org/issue34296 13 msgs #34363: dataclasses.asdict() mishandles dataclass instance attributes https://bugs.python.org/issue34363 7 msgs #34247: PYTHONOPTIMIZE ignored in 3.7.0 when using custom launcher https://bugs.python.org/issue34247 6 msgs #34284: Nonsensical exception message when calling `__new__` on non-in https://bugs.python.org/issue34284 6 msgs #34355: SIGSEGV (Address boundary error) https://bugs.python.org/issue34355 5 msgs #24255: Replace debuglevel-related logic with logging https://bugs.python.org/issue24255 4 msgs #32073: Add copy_directory_metadata parameter to shutil.copytree https://bugs.python.org/issue32073 4 msgs #34272: Reorganize C API tests https://bugs.python.org/issue34272 4 msgs #34319: Clarify pathlib.Path("filepath").read_text() https://bugs.python.org/issue34319 4 msgs Issues closed (41) ================== #2651: Strings passed to KeyError do not round trip https://bugs.python.org/issue2651 closed by lukasz.langa #6952: deprecated conversion from string constant to char * https://bugs.python.org/issue6952 closed by berker.peksag #13574: refresh example in doc for Extending and Embedding https://bugs.python.org/issue13574 closed by berker.peksag #18540: imaplib.IMAP4() ends with "Name or service not known" on Fedor https://bugs.python.org/issue18540 closed by berker.peksag #23876: Fix mkdir() call for Watcom compilers on UNIX-like platforms https://bugs.python.org/issue23876 closed by Jeffrey.Armstrong #28044: Make the sidebar in the documentation follow the section autom https://bugs.python.org/issue28044 closed by Mariatta #29036: logging module: Add `full_module_name` to LogRecord details https://bugs.python.org/issue29036 closed by vinay.sajip #31047: Windows: os.path.isabs(os.path.abspath(" ")) == False https://bugs.python.org/issue31047 closed by steve.dower #32638: distutils test errors with AIX and xlc https://bugs.python.org/issue32638 closed by Michael.Felt #33161: Refactor of pathlib's _WindowsBehavior.gethomedir https://bugs.python.org/issue33161 closed by berker.peksag #33736: Improve the documentation of asyncio stream API https://bugs.python.org/issue33736 closed by berker.peksag #33839: IDLE tooltips.py: refactor and add docstrings and tests https://bugs.python.org/issue33839 closed by taleinat #34047: IDLE: on macOS, scroll slider 'sticks' at bottom of file https://bugs.python.org/issue34047 closed by taleinat #34236: Test6012 in test_capi is not run as part of make test https://bugs.python.org/issue34236 closed by serhiy.storchaka #34242: configparser: SectionProxy.get is silent on missing options https://bugs.python.org/issue34242 closed by lukasz.langa #34244: Add support of check logger https://bugs.python.org/issue34244 closed by vinay.sajip #34253: Tkinter- On windows, calling filedialog or messagebox before t https://bugs.python.org/issue34253 closed by terry.reedy #34254: Include type annotations in error messages for better errors https://bugs.python.org/issue34254 closed by xtreak #34270: Add names to asyncio tasks https://bugs.python.org/issue34270 closed by yselivanov #34273: %f is confusingly associated with fixed point format https://bugs.python.org/issue34273 closed by terry.reedy #34310: Build error with option "--with-pydebug" on Mac OS 10.13.6 https://bugs.python.org/issue34310 closed by matrixise #34312: Allow str.endswith and str.startswith to accept an iterable https://bugs.python.org/issue34312 closed by brett.cannon #34324: Doc README wrong directory name for venv https://bugs.python.org/issue34324 closed by Mariatta #34325: test_zipfile gets OverflowError in multiple buildbots https://bugs.python.org/issue34325 closed by vstinner #34326: test_subprocess.POSIXProcessTestCase fails in AMD64 Ubuntu 3.x https://bugs.python.org/issue34326 closed by matrixise #34329: Document how to remove a suffix with pathlib.Path.with_suffix https://bugs.python.org/issue34329 closed by berker.peksag #34332: Suggestion for a new loop type https://bugs.python.org/issue34332 closed by zach.ware #34335: Fix examples in asyncio docs (suppliment to bpo-32258) https://bugs.python.org/issue34335 closed by Mariatta #34336: Don't promote possibility to omit Optional on optional/default https://bugs.python.org/issue34336 closed by levkivskyi #34337: Fail to get a right answer for 1.2%0.2 https://bugs.python.org/issue34337 closed by mark.dickinson #34339: Argument unpacking syntax for lambdas https://bugs.python.org/issue34339 closed by danijar #34342: Fix the broken links in CPythonVmInternals wiki page https://bugs.python.org/issue34342 closed by berker.peksag #34343: Why is turtle still present in python embedded for Windows? https://bugs.python.org/issue34343 closed by vtudorache #34348: Python 3.7 - Issues Installing Scikit Learn https://bugs.python.org/issue34348 closed by mark.dickinson #34350: Non obvious logging handler behaviour https://bugs.python.org/issue34350 closed by vinay.sajip #34351: Python 3.7 - Issues Installing Scikit Learn https://bugs.python.org/issue34351 closed by mark.dickinson #34352: Using tailf with python3.4 https://bugs.python.org/issue34352 closed by zach.ware #34353: stat's python implementation of filemode (fallback) doesn't be https://bugs.python.org/issue34353 closed by benjamin.peterson #34358: round() combined with product outputs ugly result https://bugs.python.org/issue34358 closed by steven.daprano #34359: Wrong virtual environment found https://bugs.python.org/issue34359 closed by paul.moore #34361: An error should be returned when there are spaces in between f https://bugs.python.org/issue34361 closed by r.david.murray

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Problem in importing python packages under python 3.6 environment
by Poornima .D. 09 Aug '18

09 Aug '18

Hi All, I have limited knowledge on python development. I am trying to write a test application which needs to import from many packages across mutliple directories. I tried using an environment variable and appending to sys.path variable so that import Class methods works. I am trying to replace the above logic by below syntax. from directory.fileName import ClassName But this syntax does not work. Please let me know any solution for this issue.

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Re: [Python-Dev] [issue11191] test_search_cpp error on AIX (with xlc)
by Michael 09 Aug '18

09 Aug '18

On 09/08/2018 00:52, Michael Felt wrote: > Change by Michael Felt <aixtools(a)felt.demon.nl>: > > > ---------- > pull_requests: +8196 > > _______________________________________ > Python tracker <report(a)bugs.python.org> > <https://bugs.python.org/issue11191> > _______________________________________ > Don't know why it is says +8196. I would have expected +8709. https://github.com/python/cpython/pull/8709 Would appreciate someone look at/review this. It corrects 6 or 7 errors from test_distutils (when not using gcc on AIX). And it is very small. Maybe smaller if the review is to remove the comments. Thx.

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Refactor __get_builtin_constructor on hasklib.py
by 蔡銘峯 08 Aug '18

08 Aug '18

Hello everybody, I am Park Tsai. I want to refactor __get_builtin_constructor on hasklib.py of python 2.7 (https://github.com/python/cpython/blob/2.7/Lib/hashlib.py#L72). This is the first time that I try to refactor code of CPython on GitHub, so I am very excited. This is __get_builtin_constructor code on hasklib.py ,as follows. def __get_builtin_constructor(name): try: if name in ('SHA1', 'sha1'): import _sha return _sha.new elif name in ('MD5', 'md5'): import _md5 return _md5.new elif name in ('SHA256', 'sha256', 'SHA224', 'sha224'): import _sha256 bs = name[3:] if bs == '256': return _sha256.sha256 elif bs == '224': return _sha256.sha224 elif name in ('SHA512', 'sha512', 'SHA384', 'sha384'): import _sha512 bs = name[3:] if bs == '512': return _sha512.sha512 elif bs == '384': return _sha512.sha384 except ImportError: pass # no extension module, this hash is unsupported. raise ValueError('unsupported hash type ' + name) When I read this code, it looks messy, so I want to refactor it and make it become more clearly . Then, it will be like this def get_builtin_constructor(name): try: if name[:3] in ('SHA','sha'): if(name[3:]=='1'): import _sha return _sha.new elif (name[3:] == '224'): import _sha256 return _sha256.sha224 elif (name[3:] == '256'): import _sha256 return _sha256.sha256 elif (name[3:] == '384'): import _sha512 return _sha512.sha384 elif (name[3:] == '512'): import _sha512 return _sha512.sha512 elif name in ('MD5', 'md5'): import _md5 return _md5.new except ImportError: pass # no extension module, this hash is unsupported. raise ValueError('unsupported hash type ' + name) I will be grateful for any help you can provide. I really appreciate any feedback you can offer! Best regards, Park Tsai !!

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The curious case of 255 function arguments
by Stephen McDowell 07 Aug '18

07 Aug '18

Hello Python Gurus, TL;DR: 3.7 released functions having greater than 255 arguments. Despite explicit checks for this in 2.x, no such limit is actually imposed -- why? In the 3.7 release notes "Other Language Changes" section ( https://docs.python.org/3.7/whatsnew/3.7.html#other-language-changes), the first bullet point denotes > More than 255 arguments can now be passed to a function, and a function can now have more than 255 parameters. (Contributed by Serhiy Storchaka in bpo-12844 <https://bugs.python.org/issue12844> and bpo-18896 <https://bugs.python.org/issue18896>.) Now lets get something straight: unless I want to exclusively support Python 3.7 or higher, I must make sure I obey the <255 rule. Use *args // **kwargs, etc. I'm totally ok with that, 2020 is already here in my mind ;) Curiosity is the reason I'm reaching out. Upon further investigation and some discussion with like-minded Python enthusiasts, the code being patched by Serhiy Storchaka is present in e.g., Python 2.7 ( https://github.com/python/cpython/blob/2.7/Python/ast.c#L2013-L2016) if (nargs + nkeywords + ngens > 255) { ast_error(n, "more than 255 arguments"); return NULL; } Despite that code, as demonstrated with the supplemental output in the post script, *no 2.x versions fail with >255 arguments*. In contrast, 3.x where x<7 all do fail (as expected) with a SyntaxError. To test this, I tried every minor release of python (excluding v1, arbitrarily choosing the latest patch release of a minor version) with the following snippet via the -c flag /path/to/pythonX.Y -c 'exec("def foo(" + ", ".join(["a" + str(i) for i in range(1, 300)]) + "): pass")' Which tries to construct a function def foo(a0, a1, ..., a299): pass I've looked at the C code for a while and it is entirely non-obvious what would lead to python *2* *allowing* >255 arguments. Anybody happen to know how / why the python *2* versions *succeed*? Thank you for reading, this is not a problem, just a burning desire for closure (even if anecdotal) as to how this can be. I deeply love python, and am not complaining! I stumbled across this and found it truly confounding, and thought the gurus here may happen to recall what changed in 3.x that lead the the error condition actually being asserted :) Sincerely, Stephen McDowell P.S. On a Fedora 25 box using GCC 6.4.1, I lovingly scripted the installation of all the python versions just to see if it truly was a 2.x / 3.x divide. The results of running `python -V` followed by the `python -c 'exec("def foo...")'` described above, with some extra prints for clarity are as follows (script hackily thrown together in ~30minutes not included, so as not to make your eyes bleed): ******************************************************************************** Python 2.0.1 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.1.3 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.2.3 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.3.7 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.4.6 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.5.6 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.6.9 ==> Greater than 255 Arguments supported ******************************************************************************** Python 2.7.15 ==> Greater than 255 Arguments supported ******************************************************************************** Python 3.0.1 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.1.5 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.2.6 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.3.7 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.4.9 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.5.6 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.6.6 Traceback (most recent call last): File "<string>", line 1, in <module> File "<string>", line 1 SyntaxError: more than 255 arguments ******************************************************************************** Python 3.7.0 ==> Greater than 255 Arguments supported P.P.S. Seriously, I LOVE PYTHON <3 It was so easy to download, configure, build, and install each of these versions, and run the test! Thank you :)

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