movermeyer / backports.datetime_fromisoformat Goto Github PK

I noticed that this backport currently only provides a source distribution.

It'd be handy to have precompiled wheels to avoid having to build the C extension at install time.

Currently, compilation fails on Windows.

Work through the compilation errors and get backports.datetime_fromisoformat working for the Windows compiler

Python 3.7 didn't only add datetime.fromisoformat, it also added time.fromisoformat and date.fromisoformat.

Backport these as well.

Python 3.11 changed fromisoformat to be able to parse a larger range of ISO 8601 timestamps

https://docs.python.org/3.11/library/datetime.html#datetime.datetime.fromisoformat

Hi,
I was wondering why the v2.0.0 is not available on conda-forge, even though the recipe was updated here.
A package I am currently creating on bioconda requires backports-datetime-fromisoformat but is not compatible with version 1.
Could you update the package retrievable via conda-forge to version 2 or do you know why it's not available?

Greetings,
Mark

Installation under python 3.8 requires compiling this package, which requires python development headers, which is annoying in CI, so please support the latest python versions with a pre-built wheel.

Is there any planned release for python 3.12 wheel?

Extend the capability of backports.datetime_fromisoformat to allow usage within Python 2.7 projects.

Python 3.10.13, ubuntu on ARM64

In file included from backports/datetime_fromisoformat/_datetimemodule.c:66:
      backports/datetime_fromisoformat/_datetimemodule.h:1:10: fatal error: Python.h: No such file or directory
          1 | #include <Python.h>
            |          ^~~~~~~~~~
      compilation terminated.
      error: command '/usr/bin/aarch64-linux-gnu-gcc' failed with exit code 1
      [end of output]

There is a nice invariant we can use Hypothesis to test.

datetime.fromisoformat is the inverse of datetime.isoformat

In other words, for every datetime object, dt, dt == datetime.fromisoformat(dt.isoformat())

Hypothesis can be used to test this invariant, using its "datetimes strategy".

When I ran pip install backports-datetime-fromisoformat on ubuntu 18 in the terminal, I ran into the following error: error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

And here is a screenshot of the error:

Thanks!

python3 -m pip install --user backports.datetime_fromisoformat

from backports.datetime_fromisoformat import MonkeyPatch

ModuleNotFoundError: No module named 'backports.datetime_fromisoformat'

username@hostname:/home/username/.local/lib/python3.6/site-packages/backports $ ls -l *
-rwxrwxr-x. 1 username username 54136 Oct 5 10:47 _datetime_fromisoformat.cpython-36m-x86_64-linux-gnu.so
username@hostname:/home/username/.local/lib/python3.6/site-packages/backports $

Thanks for providing this awesome backport! Today I ran into the issue that a datetime object can't be pickled when it includes a timezone. Please find the example below:

$ python
Python 3.6.5 (default, Mar 30 2018, 06:41:53)
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pickle
>>> import datetime
>>> from backports.datetime_fromisoformat import MonkeyPatch
>>> MonkeyPatch.patch_fromisoformat()
>>> moment = datetime.datetime.fromisoformat('2018-11-01 20:42:09.058000+00:00')
>>> pickle.dumps(moment)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
_pickle.PicklingError: Can't pickle <class 'FixedOffset_type'>: attribute lookup FixedOffset_type on builtins failed
>>> moment = datetime.datetime.fromisoformat('2018-11-01 20:42:09.058000')
>>> pickle.dumps(moment)
b'\x80\x03cdatetime\ndatetime\nq\x00C\n\x07\xe2\x0b\x01\x14*\t\x00\xe2\x90q\x01\x85q\x02Rq\x03.'

Unfortunately, I lack the skills to create a PR to resolve this.

Currently, backports.datetime_fromisoformat only exposes a method that is equivalent to datetime.fromisoformat.

Really, it should monkey-patch datetime so that usage becomes something like:

from datetime import datetime

import backports.datetime_fromisoformat
backports.datetime_fromisoformat.monkey_patch()

now = datetime.utcnow().isoformat()
now_again = datetime.fromisoformat(now)

For Python 3.7+, this should be a no-op so that it doesn't change the built-in behaviour.

Running into this error while installing packages from requirements.txt file on windows using pip, using python 3.8.10 and pip 20.1.1.
Help is desperately needed.

It would be nice if this library also worked with PyPy.
It might not be that hard to get it working.

Known issues

• Py_UNICODE_IS_SURROGATE doesn't exist in PyPy
  • Easy to vendor
• _PyUnicode_Copy doesn't exist in PyPy
  • Read python/cpython#8959 for context, then vendor?
• The way we monkeypatch the methods is very cPython specific
  • Figure out the proper PyPy way