Intellisense for subclasses #626

Environment data

VS Code version: 1.19.2
Python Extension version: 0.9.1
Python Version: 3.5.2
OS and version: Windows 7 x64

Actual behavior

class A:
    def __init__(self, value):
        self.field = value

class B(A):
    def __init__(self, value):
        super().__init__(value)


a = A("A string")    
a.field. <- Intellisense works (type of 'field' is known)
b = B("A string")
b.field. <- Intellisense does not work (type of 'field' is not known)

Expected behavior

Expected that Intellisense would be available for B, just the same as for A. In B Intellisense recognizes that B has an (inherited) field called 'field', but the type of 'field' is not known.

Steps to reproduce:

See Actual behavior

Logs

Output from Python output panel

Output from Console window (Help->Developer Tools menu)