Fixes TypeError when using Sphinx 3.4 with autodocsumm (add to your conf.py)

conf.py

import autodocsumm


def make_get_doc(original):
    def get_doc(*args, **kwargs):
        r = original(*args, **kwargs)
        return r or []
    return get_doc


clss = [
    autodocsumm.AutoSummClassDocumenter,
    autodocsumm.AutoSummModuleDocumenter,
    autodocsumm.CallableAttributeDocumenter,
    autodocsumm.NoDataDataDocumenter,
    autodocsumm.NoDataAttributeDocumenter,
]
for cls in clss:
    cls.get_doc = make_get_doc(cls.get_doc)