I have a problem getting the diagram feature to work as expected.
Imagine a project with the following classes:
class Base(object): pass
class SubClass1(Base): pass
class SubClass2(Base): pass
I right-click on SubClass1, select Diagram | Show Diagram and select Python class diagram.
Everything fine so far.
Then I press space (Add class to diagram) and select SubClass2.
SubClass2 is added to the diagram but (and this is the problem):
There is no line on the diagram indicating that SubClass2 is a subclass of Base.