Mailman 3 February 2015 - Python-checkins

cpython (3.4): Fix copy/paste error in bytes.isupper() doc.
by zach.ware Feb. 27, 2015

Feb. 27, 2015

https://hg.python.org/cpython/rev/d0e15d9cdd4b changeset: 94769:d0e15d9cdd4b branch: 3.4 parent: 94765:ed27f53137ad user: Zachary Ware <zachary.ware(a)gmail.com> date: Fri Feb 27 01:40:22 2015 -0600 summary: Fix copy/paste error in bytes.isupper() doc. Reported by Jon Colburn on docs@. files: Doc/library/stdtypes.rst | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst --- a/Doc/… [View More]

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cpython: Bump the blocksize up from 62 to 64 to speed up the modulo calculation.
by raymond.hettinger Feb. 27, 2015

Feb. 27, 2015

https://hg.python.org/cpython/rev/430cab0c5cbf changeset: 94768:430cab0c5cbf user: Raymond Hettinger <python(a)rcn.com> date: Thu Feb 26 23:21:29 2015 -0800 summary: Bump the blocksize up from 62 to 64 to speed up the modulo calculation. Remove the old comment suggesting that it was desireable to have blocksize+2 as a multiple of the cache line length. That would have made sense only if the block structure start point was always aligned to a cache line boundary. … [View More]

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cpython: unix newlines
by benjamin.peterson Feb. 27, 2015

Feb. 27, 2015

https://hg.python.org/cpython/rev/dc55b5ce6b26 changeset: 94767:dc55b5ce6b26 user: Benjamin Peterson <benjamin(a)python.org> date: Thu Feb 26 22:50:43 2015 -0500 summary: unix newlines files: .hgtags | 292 ++++++++++++++++++++++---------------------- 1 files changed, 146 insertions(+), 146 deletions(-) diff --git a/.hgtags b/.hgtags --- a/.hgtags +++ b/.hgtags @@ -1,147 +1,147 @@ -64cc5439e10a6fdf984effaf0141e94fa4cc1004 v0.9.8 -… [View More]78a7ed6953025e7ecdde9585099b01a6ae40b76a v0.9.9 -b15b8cc9b8d10e0352a0b8b7e8d51fa309db6df3 v1.0.1 -0326b5d61445ee3a8d3de28119f9652cb72d2e3f v1.0.2 -832615ec07646e310c85316b8ba6bc9b17ad3547 v1.1 -9895475d18c7b5f32adaf78f71886ae041e4d10c v1.1.1 -16eb4c51ee97169046340998e850a63c65225b0a v1.2b1 -b45c688756d04fb84d4a0d518fc3d7e3cb25fa8d v1.2b2 -9e82daf7605bad7976a9abc997cb5e0abe434078 v1.2b3 -065e31cf5862e27521cf5725b003aed211f091b2 v1.2b4 -e72257e655454d569468da8b1189e0ec336f3536 v1.2 -e63d83f8275853aaaa3d1972cb86564505e65583 v1.3b1 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+7ff62415e4263c432c8acf6e424224209211eadb v3.3.4 +9ec811df548ed154a9bf9815383a916d6df31b98 v3.3.5rc1 +ca5635efe090f78806188ac2758f9948596aa8b2 v3.3.5rc2 +62cf4e77f78564714e7ea3d4bf1479ca1fbd0758 v3.3.5 +51317c9786f54267975abf2e9c502e6aaaa4a249 v3.3.6rc1 +971fec30da1fc5bf2b9fb28e09812a5127014211 v3.3.6 +46535f65e7f3bcdcf176f36d34bc1fed719ffd2b v3.4.0a1 +9265a2168e2cb2a84785d8717792acc661e6b692 v3.4.0a2 +dd9cdf90a5073510877e9dd5112f8e6cf20d5e89 v3.4.0a3 +e245b0d7209bb6d0e19316e1e2af1aa9c2139104 v3.4.0a4 +3405dc9a6afaa0a06dd1f6f182ec5c998dce6f5f v3.4.0b1 +ba32913eb13ec545a46dd0ce18035b6c416f0d78 v3.4.0b2 +a97ce3ecc96af79bd2e1ac66ce48d9138e0ca749 v3.4.0b3 +5e088cea8660677969113741c1313d570d977e02 v3.4.0rc1 +a300712ed38c9a242b736c44e806caea25a6dc05 v3.4.0rc2 +8a81cdab3e9d521daaef989fade94b16455fc3b8 v3.4.0rc3 +04f714765c13824c3bc2835d7b008908862e083a v3.4.0 +c67a19e11a7191baf30f313bf55e2e0b6c6f574e v3.4.1rc1 +c0e311e010fcb5bae8d87ca22051cd0845ea0ca0 v3.4.1 +8711a09513848cfc48c689d983495ee64f4668ca v3.4.2rc1 +ab2c023a9432f16652e89c404bbc84aa91bf55af v3.4.2 +69dd528ca6255a66c37cc5cf680e8357d108b036 v3.4.3rc1 b4cbecbc0781e89a309d03b60a1f75f8499250e6 v3.4.3 -5d4b6a57d5fd7564bf73f3db0e46fe5eeb00bcd8 v3.5.0a1 +5d4b6a57d5fd7564bf73f3db0e46fe5eeb00bcd8 v3.5.0a1 -- Repository URL: https://hg.python.org/cpython [View Less]

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cpython (3.4): remove duplicate 3.4.3 tags
by benjamin.peterson Feb. 27, 2015

Feb. 27, 2015

https://hg.python.org/cpython/rev/ed27f53137ad changeset: 94765:ed27f53137ad branch: 3.4 parent: 94763:4ce53fdb6438 user: Benjamin Peterson <benjamin(a)python.org> date: Thu Feb 26 22:49:21 2015 -0500 summary: remove duplicate 3.4.3 tags files: .hgtags | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/.hgtags b/.hgtags --- a/.hgtags +++ b/.hgtags @@ -143,6 +143,4 @@ 8711a09513848cfc48c689d983495ee64f4668ca v3.4.2rc1 … [View More]

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cpython (merge 3.4 -> default): merge 3.4
by benjamin.peterson Feb. 27, 2015

Feb. 27, 2015

https://hg.python.org/cpython/rev/9b9887bd7734 changeset: 94766:9b9887bd7734 parent: 94764:2eb99070a38f parent: 94765:ed27f53137ad user: Benjamin Peterson <benjamin(a)python.org> date: Thu Feb 26 22:50:12 2015 -0500 summary: merge 3.4 files: .hgtags | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/.hgtags b/.hgtags --- a/.hgtags +++ b/.hgtags @@ -143,4 +143,5 @@ 8711a09513848cfc48c689d983495ee64f4668ca v3.4.2rc1 … [View More]

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cpython: Issue #23465: Implement PEP 486 - Make the Python Launcher aware of virtual
by steve.dower Feb. 26, 2015

Feb. 26, 2015

https://hg.python.org/cpython/rev/2eb99070a38f changeset: 94764:2eb99070a38f parent: 94756:7c6e3358221a user: Steve Dower <steve.dower(a)microsoft.com> date: Thu Feb 26 14:25:33 2015 -0800 summary: Issue #23465: Implement PEP 486 - Make the Python Launcher aware of virtual environments (patch by Paul Moore) files: Doc/using/windows.rst | 20 ++++++++++++++ Doc/whatsnew/3.5.rst | 12 ++++++++ Misc/NEWS | 3 ++ PC/launcher.c | 42 +++++++… [View More]+++++++++++++++++++++-- 4 files changed, 73 insertions(+), 4 deletions(-) diff --git a/Doc/using/windows.rst b/Doc/using/windows.rst --- a/Doc/using/windows.rst +++ b/Doc/using/windows.rst @@ -404,6 +404,16 @@ Per-user installations of Python do not add the launcher to :envvar:`PATH` unless the option was selected on installation. +Virtual environments +^^^^^^^^^^^^^^^^^^^^ + +If the launcher is run with no explicit Python version specification, and a +virtual environment (created with the standard library :mod:`venv` module or +the external ``virtualenv`` tool) active, the launcher will run the virtual +environment's interpreter rather than the global one. To run the global +interpreter, either deactivate the virtual environment, or explicitly specify +the global Python version. + From a script ^^^^^^^^^^^^^ @@ -478,6 +488,16 @@ on Windows which you hope will be useful on Unix, you should use one of the shebang lines starting with ``/usr``. +Any of the above virtual commands can be suffixed with an explicit version +(either just the major version, or the major and minor version) - for example +``/usr/bin/python2.7`` - which will cause that specific version to be located +and used. + +The ``/usr/bin/env`` form of shebang line has one further special property. +Before looking for installed Python interpreters, this form will search the +executable :envvar:`PATH` for a Python executable. This corresponds to the +behaviour of the Unix ``env`` program, which performs a :envvar:`PATH` search. + Arguments in shebang lines -------------------------- diff --git a/Doc/whatsnew/3.5.rst b/Doc/whatsnew/3.5.rst --- a/Doc/whatsnew/3.5.rst +++ b/Doc/whatsnew/3.5.rst @@ -123,6 +123,18 @@ :pep:`475` -- Retry system calls failing with EINTR +PEP 486: Make the Python Launcher aware of virtual environments +--------------------------------------------------------------- + +:pep:`486` makes the Windows launcher (see :pep:`397`) aware of an active +virtual environment. When the default interpreter would be used and the +``VIRTUAL_ENV`` environment variable is set, the interpreter in the virtual +environment will be used. + +.. seealso:: + + :pep:`486` -- Make the Python Launcher aware of virtual environments + Other Language Changes ====================== diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -77,6 +77,9 @@ Windows ------- +- Issue #23465: Implement PEP 486 - Make the Python Launcher aware of virtual + environments. Patch by Paul Moore. + - Issue #23437: Make user scripts directory versioned on Windows. Patch by Paul Moore. diff --git a/PC/launcher.c b/PC/launcher.c --- a/PC/launcher.c +++ b/PC/launcher.c @@ -384,6 +384,31 @@ } +static wchar_t * +find_python_by_venv() +{ + static wchar_t venv_python[MAX_PATH]; + wchar_t *virtual_env = get_env(L"VIRTUAL_ENV"); + DWORD attrs; + + /* Check for VIRTUAL_ENV environment variable */ + if (virtual_env == NULL || virtual_env[0] == L'\0') { + return NULL; + } + + /* Check for a python executable in the venv */ + debug(L"Checking for Python executable in virtual env '%ls'\n", virtual_env); + _snwprintf_s(venv_python, MAX_PATH, _TRUNCATE, + L"%ls\\Scripts\\%ls", virtual_env, PYTHON_EXECUTABLE); + attrs = GetFileAttributesW(venv_python); + if (attrs == INVALID_FILE_ATTRIBUTES) { + debug(L"Python executable %ls missing from virtual env\n", venv_python); + return NULL; + } + + return venv_python; +} + static wchar_t appdata_ini_path[MAX_PATH]; static wchar_t launcher_ini_path[MAX_PATH]; @@ -1309,6 +1334,7 @@ { wchar_t * wp; wchar_t * command; + wchar_t * executable; wchar_t * p; int rc = 0; size_t plen; @@ -1453,6 +1479,7 @@ if (ip == NULL) error(RC_NO_PYTHON, L"Requested Python version (%ls) not \ installed", &p[1]); + executable = ip->executable; command += wcslen(p); command = skip_whitespace(command); } @@ -1470,9 +1497,16 @@ #endif if (!valid) { - ip = locate_python(L""); - if (ip == NULL) - error(RC_NO_PYTHON, L"Can't find a default Python."); + /* Look for an active virtualenv */ + executable = find_python_by_venv(); + + /* If we didn't find one, look for the default Python */ + if (executable == NULL) { + ip = locate_python(L""); + if (ip == NULL) + error(RC_NO_PYTHON, L"Can't find a default Python."); + executable = ip->executable; + } if ((argc == 2) && (!_wcsicmp(p, L"-h") || !_wcsicmp(p, L"--help"))) { #if defined(_M_X64) BOOL canDo64bit = TRUE; @@ -1500,7 +1534,7 @@ fflush(stdout); } } - invoke_child(ip->executable, NULL, command); + invoke_child(executable, NULL, command); return rc; } -- Repository URL: https://hg.python.org/cpython [View Less]

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peps: Record acceptances of PEPs 441 and 486, including trivial fixes for each
by chris.angelico Feb. 26, 2015

Feb. 26, 2015

https://hg.python.org/peps/rev/1d3f1e41c8b8 changeset: 5711:1d3f1e41c8b8 user: Chris Angelico <rosuav(a)gmail.com> date: Fri Feb 27 09:19:06 2015 +1100 summary: Record acceptances of PEPs 441 and 486, including trivial fixes for each courtesy of Paul Moore files: pep-0441.txt | 7 ++++--- pep-0486.txt | 7 ++++--- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/pep-0441.txt b/pep-0441.txt --- a/pep-0441.txt +++ b/pep-0441.txt @@ -5,11 +5,12 @@ … [View More]Author: Daniel Holth <dholth(a)gmail.com>, Paul Moore <p.f.moore(a)gmail.com> Discussions-To: https://mail.python.org/pipermail/python-dev/2015-February/138277.html -Status: Draft +Status: Accepted Type: Standards Track Content-Type: text/x-rst Created: 30 March 2013 Post-History: 30 March 2013, 1 April 2013, 16 February 2015 +Resolution: https://mail.python.org/pipermail/python-dev/2015-February/138578.html Improving Python ZIP Application Support ======================================== @@ -101,7 +102,7 @@ will be created from the content of that directory. * The name of an existing application archive file, in which case the file is copied to the target. The file name should include the - ``.pyz`` extension, if required. + ``.pyz`` or ``.pyzw`` extension, if required. * A file object open for reading in bytes mode. The content of the file should be an application archive, and the file object is assumed to be positioned at the start of the archive. @@ -172,7 +173,7 @@ The destination archive will have the specified name. The given name will be used as written, so should include the - ".pyz" extension. + ".pyz" or ".pyzw" extension. -p interpreter / --python interpreter diff --git a/pep-0486.txt b/pep-0486.txt --- a/pep-0486.txt +++ b/pep-0486.txt @@ -3,12 +3,13 @@ Version: $Revision$ Last-Modified: $Date$ Author: Paul Moore <p.f.moore(a)gmail.com> -Status: Draft +Status: Accepted Type: Standards Track Content-Type: text/x-rst Created: 12-Feb-2015 Python-Version: 3.5 -Post-History: +Post-History: 12-Feb-2015 +Resolution: https://mail.python.org/pipermail/python-dev/2015-February/138579.html Abstract @@ -51,7 +52,7 @@ python # Execute an installed module (these could use python -m, - # which is longer to type but is a little mopre similar to the + # which is longer to type but is a little more similar to the # launcher approach) pip install pytest py.test -- Repository URL: https://hg.python.org/peps [View Less]

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peps: Update to PEP 448 -- approved 2 out of 3, rejected *comprehension.
by guido.van.rossum Feb. 26, 2015

Feb. 26, 2015

https://hg.python.org/peps/rev/bf59e2ae3b3c changeset: 5710:bf59e2ae3b3c user: Guido van Rossum <guido(a)python.org> date: Thu Feb 26 12:17:47 2015 -0800 summary: Update to PEP 448 -- approved 2 out of 3, rejected *comprehension. files: pep-0448.txt | 115 ++++++++++++++++++++++---------------- 1 files changed, 65 insertions(+), 50 deletions(-) diff --git a/pep-0448.txt b/pep-0448.txt --- a/pep-0448.txt +++ b/pep-0448.txt @@ -4,11 +4,11 @@ Last-Modified: $Date$ … [View More]Author: Joshua Landau <joshua(a)landau.ws> Discussions-To: python-ideas(a)python.org -Status: Draft +Status: Accepted Type: Standards Track Content-Type: text/x-rst Created: 29-Jun-2013 -Python-Version: 3.4 +Python-Version: 3.5 Post-History: @@ -50,15 +50,9 @@ >>> {**{'x': 2}, 'x': 1} {'x': 1} -Unpacking is proposed to be allowed inside list, set, -and dictionary comprehensions:: - - >>> ranges = [range(i) for i in range(5)] - >>> [*item for item in ranges] - [0, 0, 1, 0, 1, 2, 0, 1, 2, 3] - - >>> {*item for item in ranges} - {0, 1, 2, 3} +This PEP does not include unpacking operators inside list, set and +dictionary comprehensions although this has not been ruled out for +future proposals. Rationale @@ -121,14 +115,6 @@ *my_tuple, *my_range]``. -The addition of unpacking to comprehensions is a logical extension. -It's usage will primarily be a neat replacement for ``[i for j in -list_of_lists for i in j]``, as the more readable -``[*l for l in list_of_lists]``. The iterable version, -``(*l for l in list_of_lists)``, replaces ``itertools.chain.from_iterable``. -Other uses are possible, but expected to occur rarely. - - Specification ============= @@ -145,7 +131,8 @@ positional argument given both positionally and by keyword — a ``TypeError`` is raised. This remains true for duplicate arguments provided through multiple ``**`` unpackings, -e.g. ``f(**{'x': 2}, **{'x': 3})``. +e.g. ``f(**{'x': 2}, **{'x': 3})``, except that the error will be +detected at runtime. A function looks like this:: @@ -159,40 +146,17 @@ act as if the elements from unpacked items were inserted in order at the site of unpacking, much as happens in unpacking in a function-call. Dictionaries require ``**`` unpacking; all the others require ``*`` unpacking. -A dictionary's key remain in a right-to-left priority order, so + +The keys in a dictionary remain in a right-to-left priority order, so ``{**{'a': 1}, 'a': 2, **{'a': 3}}`` evaluates to ``{'a': 3}``. There is no restriction on the number or position of unpackings. -Comprehensions, by simple extension, will support unpacking. As before, -dictionaries require ``**`` unpacking, all the others require ``*`` -unpacking and key priorities are unchanged. - -For example:: - - {*[1, 2, 3], 4, 5, *{6, 7, 8}} - - (*e for e in [[1], [3, 4, 5], [2]]) - - {**dictionary for dictionary in (globals(), locals())} - - {**locals(), "override": None} - -Unbracketed comprehensions in function calls, such as ``f(x for x in it)``, -are already valid. These could be extended to:: - - f(*x for x in it) == f((*x for x in it)) - f(**x for x in it) == f({**x for x in it}) - -However, this is likely to be confusing and is not included in this -PEP. These will throw ``SyntaxError`` and comprehensions with explicit -brackets should be used instead. - Disadvantages ============= The allowable orders for arguments in a function call are more -complicated than before. The simplest explanation for the rules +complicated than before. The simplest explanation for the rules may be "positional arguments precede keyword arguments and ``**`` unpacking; ``*`` unpacking precedes ``**`` unpacking". @@ -200,24 +164,75 @@ ``elements = *iterable,`` causes ``elements`` to be a tuple. The reason for this may confuse people unfamiliar with the construct. +Concerns have been raised about the unexpected difference between +duplicate keys in dictionaries being allowed but duplicate keys +in function call syntax raising an error. Although this is already +the case with current syntax, this proposal might exacerbate the +issue. It remains to be seen how much of an issue this is in practice. + + +Variations +========== + +The PEP originally considered whether the ordering of argument types +in a function call (positional, keyword, ``*`` or ``**``) could become +less strict. This met little support so the idea was shelved. + +Earlier iterations of this PEP allowed unpacking operators inside +list, set, and dictionary comprehensions as a flattening operator +over iterables of containers:: + + >>> ranges = [range(i) for i in range(5)] + >>> [*item for item in ranges] + [0, 0, 1, 0, 1, 2, 0, 1, 2, 3] + + >>> {*item for item in ranges} + {0, 1, 2, 3} + +This was met with a mix of strong concerns about readability and mild +support. In order not to disadvantage the less controversial aspects +of the PEP, this was not accepted with the rest of the proposal. + +Unbracketed comprehensions in function calls, such as ``f(x for x in it)``, +are already valid. These could be extended to:: + + f(*x for x in it) == f((*x for x in it)) + f(**x for x in it) == f({**x for x in it}) + +However, it wasn't clear if this was the best behaviour or if it should +unpack into the arguments of the call to `f`. Since this is likely to be +confusing and is of only very marginal utility, it is not included in this +PEP. Instead, these will throw a ``SyntaxError`` and comprehensions with +explicit brackets should be used instead. + + +Approval +======== + +This PEP was accepted by Guido on February 25, 2015 [1]_. + Implementation ============== -An implementation for Python 3.5 is found at Issue 2292 on bug tracker [1]_. +An implementation for Python 3.5 is found at Issue 2292 on bug tracker [2]_. +This currently includes support for unpacking inside comprehensions, which +should be removed. References ========== -.. [1] Issue 2292, "Missing `*`-unpacking generalizations", Thomas Wouters +.. [1] PEP accepted, "PEP 448 review", Guido van Rossum + (https://mail.python.org/pipermail/python-dev/2015-February/138564.html) + +.. [2] Issue 2292, "Missing `*`-unpacking generalizations", Thomas Wouters (http://bugs.python.org/issue2292) -.. [2] Discussion on Python-ideas list, +.. [3] Discussion on Python-ideas list, "list / array comprehensions extension", Alexander Heger (http://mail.python.org/pipermail/python-ideas/2011-December/013097.html) - Copyright ========= -- Repository URL: https://hg.python.org/peps [View Less]

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peps: Apply PEP 441 changes from Paul Moore
by chris.angelico Feb. 26, 2015

Feb. 26, 2015

https://hg.python.org/peps/rev/a7f743bfd565 changeset: 5709:a7f743bfd565 user: Chris Angelico <rosuav(a)gmail.com> date: Fri Feb 27 04:36:44 2015 +1100 summary: Apply PEP 441 changes from Paul Moore files: pep-0441.txt | 130 ++++++++++++++++++++++++++++---------- 1 files changed, 94 insertions(+), 36 deletions(-) diff --git a/pep-0441.txt b/pep-0441.txt --- a/pep-0441.txt +++ b/pep-0441.txt @@ -73,6 +73,7 @@ standard and is how self-extracting ZIP archives and … [View More]the bdist_wininst installer format work. + Minimal Tooling: The zipapp Module ================================== @@ -82,47 +83,75 @@ -m zipapp``) for their creation and manipulation. More complete tools for managing Python Zip Applications are -encouraged as 3rd party applications on PyPI. Currently, pyyzer [5]_ -and pex [6]_ are two tools known to exist. +encouraged as 3rd party applications on PyPI. Currently, pyzzer [5]_ +and pex [6]_ are two such tools. Module Interface ---------------- The zipapp module will provide the following functions: -``pack(directory, target=None, interpreter=None, main=None)`` -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +``create_archive(source, target=None, interpreter=None, main=None)`` +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Writes an application archive called *target*, containing the contents -of *directory*. The *target* can be a filename, or a file-like object -(which must be open for writing in bytes mode), or None (which means -use the name of *directory* with ``.pyz`` appended). If *interpreter* -is specified, it will be written to the start of the archive as a -shebang line and the file will be made executable (if no interpreter -is specified, the shebang line will be omitted). If the directory -contains no ``__main__.py`` file, the function will construct a -``__main__.py`` which calls the function specified in the *main* -argument (which should be in the form ``'pkg.mod:fn'``). +Create an application archive from *source*. The source can be any +of the following: -It is an error to specify *main* if the directory contains a -``__main__.py``, or to omit *main* when there is no ``__main__.py`` -(as that will result in an archive which has no main function and so -cannot be executed). +* The name of a directory, in which case a new application archive + will be created from the content of that directory. +* The name of an existing application archive file, in which case the + file is copied to the target. The file name should include the + ``.pyz`` extension, if required. +* A file object open for reading in bytes mode. The content of the + file should be an application archive, and the file object is + assumed to be positioned at the start of the archive. + +The *target* argument determines where the resulting archive will be +written: + +* If it is the name of a file, the archive will be written to that + file. +* If it is an open file object, the archive will be written to that + file object, which must be open for writing in bytes mode. +* If the target is omitted (or None), the source must be a directory + and the target will be a file with the same name as the source, with + a ``.pyz`` extension added. + +The *interpreter* argument specifies the name of the Python +interpreter with which the archive will be executed. It is written as +a "shebang" line at the start of the archive. On Unix, this will be +interpreted by the OS, and on Windows it will be handled by the Python +launcher. Omitting the *interpreter* results in no shebang line being +written. If an interpreter is specified, and the target is a +filename, the executable bit of the target file will be set. + +The *main* argument specifies the name of a callable which will be +used as the main program for the archive. It can only be specified if +the source is a directory, and the source does not already contain a +``__main__.py`` file. The *main* argument should take the form +"pkg.module:callable" and the archive will be run by importing +"pkg.module" and executing the given callable with no arguments. It +is an error to omit *main* if the source is a directory and does not +contain a ``__main__.py`` file, as otherwise the resulting archive +would not be executable. + +If a file object is specified for *source* or *target*, it is the +caller's responsibility to close it after calling create_archive. + +When copying an existing archive, file objects supplied only need +``read`` and ``readline``, or ``write`` methods. When creating an +archive from a directory, if the target is a file object it will be +passed to the ``zipfile.ZipFile`` class, and must supply the methods +needed by that class. ``get_interpreter(archive)`` ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Returns the interpreter specified in the shebang line of the *archive*. -If there is no shebang, the function returns ``None``. +Returns the interpreter specified in the shebang line of the +*archive*. If there is no shebang, the function returns ``None``. +The *archive* argument can be a filename or a file-like object open +for reading in bytes mode. -``set_interpreter(archive, new_archive, interpreter=None)`` -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -Modifies the *archive*'s shebang line to contain the specified -interpreter, and writes the updated archive to *new_archive*. If the -*interpreter* is ``None``, removes the shebang line. The -*new_archive* argument can be a filename, or a file-like object open -for writing in byte mode. Command Line Usage ------------------ @@ -130,22 +159,25 @@ The zipapp module can be run with the python ``-m`` flag. The command line interface is as follows:: - python -m zipapp [options] directory + python -m zipapp directory [options] - Create an archive from the contents of the given directory. By - default, an archive will be created with the same name as the - source directory, with a .pyz extension. + Create an archive from the given directory. An archive will + be created from the contents of that directory. The archive + will have the same name as the source directory with a .pyz + extension. The following options can be specified: -o archive / --output archive - The destination archive will have the specified name. + The destination archive will have the specified name. The + given name will be used as written, so should include the + ".pyz" extension. -p interpreter / --python interpreter The given interpreter will be written to the shebang line - of the archive. If this option is not given, the archive + of the archive. If this option is not given, the archive will have no shebang line. -m pkg.mod:fn / --main pkg.mod:fn @@ -155,10 +187,36 @@ which calls fn from the module pkg.mod. The behaviour of the command line interface matches that of -``zipapp.pack()``. +``zipapp.create_archive()``. + +In addition, it is possible to use the command line interface to work +with an existing archive:: + + python -m zipapp app.pyz --show + + Displays the shebang line of an archive. Output is of the + form + + Interpreter: /usr/bin/env + or + Interpreter: <none> + + and is intended for diagnostic use, not for scripts. + + python -m zipapp app.pyz -o newapp.pyz [-p interpreter] + + Copy app.pyz to newapp.pyz, modifying the shebang line based + on the -p option (as for creating an archive, no -p option + means remove the shebang line). Specifying a destination is + mandatory. + + In-place modification of an archive is *not* supported, as the + risk of damaging archives is too great for a simple tool. As noted, the archives are standard zip files, and so can be unpacked -using any standard ZIP utility or Python's zipfile module. +using any standard ZIP utility or Python's zipfile module. For this +reason, no interfaces to list the contents of an archive, or unpack +them, are provided or needed. FAQ --- -- Repository URL: https://hg.python.org/peps [View Less]

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peps: Update final release date for (slightly slipped) Python 3.4.3.
by larry.hastings Feb. 26, 2015

Feb. 26, 2015

https://hg.python.org/peps/rev/de5f2f496d69 changeset: 5708:de5f2f496d69 user: Larry Hastings <larry(a)hastings.org> date: Thu Feb 26 06:01:00 2015 -0800 summary: Update final release date for (slightly slipped) Python 3.4.3. files: pep-0101.txt | 4 ++-- pep-0429.txt | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/pep-0101.txt b/pep-0101.txt --- a/pep-0101.txt +++ b/pep-0101.txt @@ -351,8 +351,8 @@ You should not see any files. I.e.… [View More]

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