PyXB-X is a fork of PyXB which aims to support Python 3.8+. The original is abandoned, and only works on Python releases upto 3.7.
One important fix that was in PyXB-X 1.2.6 was around changes to datetime in Python 3.8. This repo hosts a test case which fails on Python 3.8, but passes on 3.7.
To run this up, it is easiest to reproduce the environment using Docker (but can be done in other ways).
Simply change the first line of the Dockerfile to be a different python version. Then re-run the below, and it'll repeat the test case on a different python version.
$ docker compose build
$ docker compose up
Depending on the version of Docker you're running, you might need "docker-compose" rather than "docker compose". The former uses Compose v1, the latter is Compose v2.
Below is the output of a build after changing the first line of the Dockerfile to the relevant version, then running the test.
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose build --progress quiet
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose --ansi never up
[+] Running 1/1
⠿ Container pyxbx-datetime-bug-pyxbtest-1 Recreated 0.2s
Attaching to pyxbx-datetime-bug-pyxbtest-1
pyxbx-datetime-bug-pyxbtest-1 | Base python reports today + 2 months - 3 days is: 2022-03-11
pyxbx-datetime-bug-pyxbtest-1 | Last updated is: 2022-01-14 02:52:03.153892
pyxbx-datetime-bug-pyxbtest-1 | zeroDate is: 2022-03-11 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | oneDate is: 2022-03-14 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | twoDate is: 2022-03-11 00:00:00
pyxbx-datetime-bug-pyxbtest-1 exited with code 0
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose build --progress quiet
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose --ansi never up
[+] Running 1/1
⠿ Container pyxbx-datetime-bug-pyxbtest-1 Recreated 1.6s
Attaching to pyxbx-datetime-bug-pyxbtest-1
pyxbx-datetime-bug-pyxbtest-1 | Base python reports today + 2 months - 3 days is: 2022-03-11
pyxbx-datetime-bug-pyxbtest-1 | Last updated is: 2022-01-14 02:52:54.903852
pyxbx-datetime-bug-pyxbtest-1 | zeroDate is: 2022-03-11 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | oneDate is: 2022-03-14 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | (2022, 3, 11, 0, 0, 0, 0, None)
pyxbx-datetime-bug-pyxbtest-1 | Traceback (most recent call last):
pyxbx-datetime-bug-pyxbtest-1 | File "test.py", line 17, in <module>
pyxbx-datetime-bug-pyxbtest-1 | period.twoDate = period.oneDate + relativedelta(days = -3)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.8/site-packages/dateutil/relativedelta.py", line 405, in __radd__
pyxbx-datetime-bug-pyxbtest-1 | return self.__add__(other)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.8/site-packages/dateutil/relativedelta.py", line 387, in __add__
pyxbx-datetime-bug-pyxbtest-1 | ret = (other.replace(**repl)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.8/site-packages/pyxb/binding/datatypes.py", line 687, in __new__
pyxbx-datetime-bug-pyxbtest-1 | raise TypeError('function takes %d arguments plus optional tzinfo (%d given)' % (len(cls._ValidFields), len(args)))
pyxbx-datetime-bug-pyxbtest-1 | TypeError: function takes 3 arguments plus optional tzinfo (8 given)
pyxbx-datetime-bug-pyxbtest-1 exited with code 1
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose build --progress quiet
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose --ansi never up
[+] Running 1/1
⠿ Container pyxbx-datetime-bug-pyxbtest-1 Recreated 0.1s
Attaching to pyxbx-datetime-bug-pyxbtest-1
pyxbx-datetime-bug-pyxbtest-1 | Traceback (most recent call last):
pyxbx-datetime-bug-pyxbtest-1 | File "/test/test.py", line 17, in <module>
pyxbx-datetime-bug-pyxbtest-1 | period.twoDate = period.oneDate + relativedelta(days = -3)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.9/site-packages/dateutil/relativedelta.py", line 405, in __radd__
pyxbx-datetime-bug-pyxbtest-1 | return self.__add__(other)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.9/site-packages/dateutil/relativedelta.py", line 387, in __add__
pyxbx-datetime-bug-pyxbtest-1 | Base python reports today + 2 months - 3 days is: 2022-03-11
pyxbx-datetime-bug-pyxbtest-1 | Last updated is: 2022-01-14 02:53:35.234246
pyxbx-datetime-bug-pyxbtest-1 | zeroDate is: 2022-03-11 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | oneDate is: 2022-03-14 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | (2022, 3, 11, 0, 0, 0, 0, None)
pyxbx-datetime-bug-pyxbtest-1 | ret = (other.replace(**repl)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.9/site-packages/pyxb/binding/datatypes.py", line 687, in __new__
pyxbx-datetime-bug-pyxbtest-1 | raise TypeError('function takes %d arguments plus optional tzinfo (%d given)' % (len(cls._ValidFields), len(args)))
pyxbx-datetime-bug-pyxbtest-1 | TypeError: function takes 3 arguments plus optional tzinfo (8 given)
pyxbx-datetime-bug-pyxbtest-1 exited with code 1
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose build --progress quiet
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$ docker compose --ansi never up
[+] Running 1/1
⠿ Container pyxbx-datetime-bug-pyxbtest-1 Recreated 0.2s
Attaching to pyxbx-datetime-bug-pyxbtest-1
pyxbx-datetime-bug-pyxbtest-1 | Base python reports today + 2 months - 3 days is: 2022-03-11
pyxbx-datetime-bug-pyxbtest-1 | Last updated is: 2022-01-14 02:54:11.377761
pyxbx-datetime-bug-pyxbtest-1 | zeroDate is: 2022-03-11 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | oneDate is: 2022-03-14 00:00:00
pyxbx-datetime-bug-pyxbtest-1 | (2022, 3, 11, 0, 0, 0, 0, None)
pyxbx-datetime-bug-pyxbtest-1 | Traceback (most recent call last):
pyxbx-datetime-bug-pyxbtest-1 | File "/test/test.py", line 17, in <module>
pyxbx-datetime-bug-pyxbtest-1 | period.twoDate = period.oneDate + relativedelta(days = -3)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.10/site-packages/dateutil/relativedelta.py", line 405, in __radd__
pyxbx-datetime-bug-pyxbtest-1 | return self.__add__(other)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.10/site-packages/dateutil/relativedelta.py", line 387, in __add__
pyxbx-datetime-bug-pyxbtest-1 | ret = (other.replace(**repl)
pyxbx-datetime-bug-pyxbtest-1 | File "/usr/local/lib/python3.10/site-packages/pyxb/binding/datatypes.py", line 687, in __new__
pyxbx-datetime-bug-pyxbtest-1 | raise TypeError('function takes %d arguments plus optional tzinfo (%d given)' % (len(cls._ValidFields), len(args)))
pyxbx-datetime-bug-pyxbtest-1 | TypeError: function takes 3 arguments plus optional tzinfo (8 given)
pyxbx-datetime-bug-pyxbtest-1 exited with code 1
(pyvenv-pyxbx-test) nathanr@indigo:~/work/junkcode/pyxbx-datetime-bug$