Pinject has difficulty to instantiate an instance for a subclass based on an abstract class

[damingwang00]

For example:

import pinject
import abc
class AbstrctClass(object):
... metaclass = abc.ABCMeta
...
class SomeClass(AbstrctClass):
... pass
...
obj_graph = pinject.new_object_graph(modules=None, classes=[AbstrctClass])
Traceback (most recent call last):
File "", line 1, in
File "/google/src/cloud/daming/fix/google3/third_party/py/pinject/object_graph.py", line 159, in new_object_graph
raise e
pinject.errors.WrongArgElementTypeError: wrong type for element 0 of arg classes: expected type but got ABCMeta

[kavika13]

This looks like a dupe of #5 to me