python: AttrObject member functions not available in derived classes

[pumbor]

Preface

In yosys's C++ class hierarchy, several classes derive from AttrObject so that they have access to a common set of attribute getters/setters. A python wrapper is generated for AttrObject, but the wrappers for the derived classes don't include the inheritance information to enable the derived classes to use the AttrObject functions.

Steps to reproduce the issue

cd yosys/examples/python-api
python3 -i script.py
design.top_module().get_src_attribute()

Expected behavior

In python, wrapped derived classes can use AttrObject methods to get to attributes.

Actual behavior

In python, wrapped derived classes of AttrObject cannot access AttrObject methods:

>>> design.top_module().get_src_attribute()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Module' object has no attribute 'get_src_attribute'

[cliffordwolf]

cc @btut