Django 4 support

[jayvdb]

There is an error collecting tests

[   78s] _________ ERROR collecting tests/management/commands/test_show_urls.py _________
[   78s] ImportError while importing test module '/home/abuild/rpmbuild/BUILD/django-extensions-3.1.5/tests/management/commands/test_show_urls.py'.
[   78s] Hint: make sure your test modules/packages have valid Python names.
[   78s] Traceback:
[   78s] /usr/lib/python3.9/site-packages/_pytest/python.py:578: in _importtestmodule
[   78s]     mod = import_path(self.fspath, mode=importmode)
[   78s] /usr/lib/python3.9/site-packages/_pytest/pathlib.py:524: in import_path
[   78s]     importlib.import_module(module_name)
[   78s] /usr/lib64/python3.9/importlib/__init__.py:127: in import_module
[   78s]     return _bootstrap._gcd_import(name[level:], package, level)
[   78s] <frozen importlib._bootstrap>:1030: in _gcd_import
[   78s]     ???
[   78s] <frozen importlib._bootstrap>:1007: in _find_and_load
[   78s]     ???
[   78s] <frozen importlib._bootstrap>:986: in _find_and_load_unlocked
[   78s]     ???
[   78s] <frozen importlib._bootstrap>:680: in _load_unlocked
[   78s]     ???
[   78s] /usr/lib/python3.9/site-packages/_pytest/assertion/rewrite.py:170: in exec_module
[   78s]     exec(co, module.__dict__)
[   78s] tests/management/commands/test_show_urls.py:4: in <module>
[   78s]     from django.conf.urls import url
[   78s] E   ImportError: cannot import name 'url' from 'django.conf.urls' (/usr/lib/python3.9/site-packages/django/conf/urls/__init__.py)

[jayvdb]

After that, lots of failures due to

[  125s]     from django.db.models.deletion import Collector
[  125s]     from django.utils import timezone
[  125s] >   from django.utils.encoding import force_str, smart_text
[  125s] E   ImportError: cannot import name 'smart_text' from 'django.utils.encoding' (/usr/lib/python3.9/site-packages/django/utils/encoding.py)
[  125s] 
[  125s] django_extensions/management/commands/dumpscript.py:44: ImportError

[jayvdb]

After fixing Django 4 renames, ShowUrlsTests fail because the output has changed in Django 4

[adambalasis]

After that, lots of failures due to

[  125s]     from django.db.models.deletion import Collector
[  125s]     from django.utils import timezone
[  125s] >   from django.utils.encoding import force_str, smart_text
[  125s] E   ImportError: cannot import name 'smart_text' from 'django.utils.encoding' (/usr/lib/python3.9/site-packages/django/utils/encoding.py)
[  125s] 
[  125s] django_extensions/management/commands/dumpscript.py:44: ImportError

That particular issue is fixed by changing the import to from django.utils.encoding import force_str, smart_str as smart_text FWIW.

[adambalasis]

Apparently, from django.conf.urls import url → from django.conf.urls import re_path as url fixes that?

[jayvdb]

#1698 likely addresses this.