No more python_2_unicode_compatible on django 3.0

[jyr]

Hi

I trying to build an app with django + django-dynamic-scraper and I have the error:

api_1  | Watching for file changes with StatReloader
api_1  | Exception in thread django-main-thread:
api_1  | Traceback (most recent call last):
api_1  |   File "/usr/local/lib/python3.7/threading.py", line 926, in _bootstrap_inner
api_1  |     self.run()
api_1  |   File "/usr/local/lib/python3.7/threading.py", line 870, in run
api_1  |     self._target(*self._args, **self._kwargs)
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 53, in wrapper
api_1  |     fn(*args, **kwargs)
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
api_1  |     autoreload.raise_last_exception()
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 76, in raise_last_exception
api_1  |     raise _exception[1]
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/core/management/__init__.py", line 357, in execute
api_1  |     autoreload.check_errors(django.setup)()
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/utils/autoreload.py", line 53, in wrapper
api_1  |     fn(*args, **kwargs)
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/__init__.py", line 24, in setup
api_1  |     apps.populate(settings.INSTALLED_APPS)
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/apps/registry.py", line 114, in populate
api_1  |     app_config.import_models()
api_1  |   File "/usr/local/lib/python3.7/site-packages/django/apps/config.py", line 211, in import_models
api_1  |     self.models_module = import_module(models_module_name)
api_1  |   File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
api_1  |     return _bootstrap._gcd_import(name[level:], package, level)
api_1  |   File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
api_1  |   File "<frozen importlib._bootstrap>", line 983, in _find_and_load
api_1  |   File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
api_1  |   File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
api_1  |   File "<frozen importlib._bootstrap_external>", line 728, in exec_module
api_1  |   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
api_1  |   File "/usr/local/lib/python3.7/site-packages/dynamic_scraper/models.py", line 3, in <module>
api_1  |     from django.utils.encoding import python_2_unicode_compatible
api_1  | ImportError: cannot import name 'python_2_unicode_compatible' from 'django.utils.encoding' (/usr/local/lib/python3.7/site-packages/django/utils/encoding.py)

After an investigación I found it 'Removed private Python 2 compatibility APIs'

😭

[mpkasp]

Looks like it can be fixed by replacing the django.utils.encoding import with importing six.

When trying to makemigrations I then get a bunch of errors of models not setting on_delete too. Seems like this package doesn't support Django 3