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The autodoc_mock_imports option requires to explicitly declare *every*
external module and sub-module that are imported by the documented code.
This is not practical as the list can become very large and must be
maintained as the code changes.
Also, the mocking is minimal which causes errors when compiling the
docs. For example, if you declare:
autodoc_mock_imports = ['django.template']
And try to document a module:
.. automodule:: my.lib.util
Which contains this code:
from django.template import Library
register = Library()
The following error occurs:
File ".../my/lib/util.py" line 2
register = Library()
TypeError: 'object' object is not callable
Other similar errors can occur such as "TypeError: 'object' object has
no len".
To address these limitations, only require to declare the top-level
module that should be mocked:
autodoc_mock_imports = ['django']
Will mock "django" but also any sub-module: "django.template",
"django.contrib", etc.
Also, make the mocked modules yield more complete dummy objects to avoid
these TypeError problems.
Behind the scenes, it uses the python import hooks mechanism specified
in PEP 302.
Signed-off-by: Robin Jarry <robin@jarry.cc>