Mailman 3 April 2020 - docs

ImportError: No module named 'pip._vendor.urllib3'
by SuryaChethanReddy ChennamiReddy April 10, 2020

April 10, 2020

i am getting an error when i am using pip to install a library. full error(ex: pip install keras): Traceback (most recent call last): File "c:\program files\python35\lib\runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) File "c:\program files\python35\lib\runpy.py", line 85, in _run_code exec(code, run_globals) File "C:\Program Files\Python35\Scripts\pip.exe\__main__.py", line 4, in <module> File "C:\Users\aks\AppData\Roaming\Python\Python35\site-packages\… [View More]

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[issue32377] Difference in ressurrection behavior with __del__ in py2 vs. py3
by Eric Cousineau April 9, 2020

April 9, 2020

New submission from Eric Cousineau <eric.cousineau(a)tri.global>: Due to how `PyObject_CallFinalizer` is written in python3, `__del__` will only *ever* be called once. In my use case, I am experimenting with a feature in `pybind11` to prevent slicing with Python class instances that inherit from pybind11-C++ base classes, which involves detecting when an instance loses all reference in Python (`Py_REFCNT(...) == 0`) but still has reference in C++ (`shared_ptr::count() > 0`), and … [View More]

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Module setuptools - Missing function 'find_namespace_packages'
by Gareth April 8, 2020

April 8, 2020

Hi, hope you get this (and it makes sense!): The title says it all, I hope. The setuptools module does not include the above function, as doc'd in: * https://setuptools.readthedocs.io/en/latest/setuptools.html#find-namespace-… * https://packaging.python.org/guides/packaging-namespace-packages/ That's according to >>>dir(setuptools) A very beautifully compact piece of software, eSim <https://github.com/FOSSEE/eSim>, uses it. Luckily, (I think) I was able to rewrite … [View More]

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Python tutorial 3.7
by Kumar Rathinam April 7, 2020

April 7, 2020

Hi Sir, I have got this PDF from online, as attached. I would like to ask you, whether you have any question papers for conducting chapter wise tests? Regards, Kumar Rathinam

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[issue40166] UNICODE HOWTO: Change the total number of code points in the introduction section
by Ama Aje My Fren April 7, 2020

April 7, 2020

New submission from Ama Aje My Fren <amaajemyfren(a)gmail.com>: The dev version of CPython gets the latest version of Unicode integrated to it regularly - and usually within dates of the latest version of Unicode coming out. The Unicode HOWTO documentation has a line in the introduction that refers to the number of Unicode code points assigned so far. This document does not appear to be changed to concur with the number of actual code points supported by CPython or the latest standard … [View More]

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[issue40194] Document special meanings of a single underscore
by cripitone April 5, 2020

April 5, 2020

New submission from cripitone <cri(a)fsfe.org>: The official documentation doesn't seem to cover the various meanings/uses of the single underscore "_", in different contexts (not just the interactive interpreter). See for example: https://www.datacamp.com/community/tutorials/role-underscore-python ---------- assignee: docs@python components: Documentation messages: 365814 nosy: cripitone, docs@python priority: normal severity: normal status: open title: Document special meanings of a … [View More]

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[issue40177] Python Language Reference Documentation
by Arnuld April 5, 2020

April 5, 2020

New submission from Arnuld <lispyarnuld(a)gmail.com>: In section "6.10.1 Value comparisons", it is written: https://docs.python.org/3/reference/expressions.html "The not-a-number values float('NaN') and decimal.Decimal('NaN') are special. Any ordered comparison of a number to a not-a-number value is false. A counter-intuitive implication is that not-a-number values are not equal to themselves. For example, if x = float('NaN'), 3 < x, x < 3, x == x, x != x are all false. This … [View More]

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[issue40191] tempfile.mkstemp() | Documentation Error
by Howard Waterfall April 5, 2020

April 5, 2020

New submission from Howard Waterfall <hwaterfall(a)gmail.com>: The documentation for tempfile.mkstemp() says: returns a tuple containing an OS-level handle to an open file (as would be returned by os.open()) and the absolute pathname of that file, in that order. I don't believe this is correct. It should say: returns a tuple containing an OS-level file descriptor and the absolute pathname of that file, in that order. I say this because this works: file_descriptor, uri = tempfile.… [View More]

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Itertools Bug
by Jack Nelson April 4, 2020

April 4, 2020

Hi, See below bug in zip_longest from itertools: -------------- from itertools import zip_longest a = ('a', 'b', 'c') b = (1, 2, 3, 4, 5) c = dict(zip_longest(a, b, fillvalue='Foo')) print(c) Expected: {'a': 1, 'b': 2, 'c': 3, ‘Foo’: 4, 'Foo': 5} Actual: {'a': 1, 'b': 2, 'c': 3, 'Foo': 5} —————— Seen when using Python 3.8.1 Best regards, Jack Nelson

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Out of date/ missing information in the Python on Windows FAQ
by Adam Kalisz April 4, 2020

April 4, 2020

Dear Pythonistas, in the section on making an executable from a Python script [0], there seems to be an old information about py2exe that it doesn't support Python 3 but py2exe.org links to pypi.org, where it says the package supports Python 3.3+ [1]. I am also really missing some information whether the PSF endorses installation via Chocolatey or other package managers [2], [3], since this seems to be a great way to install Python with basically one simple command line (or two, if you count … [View More]

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