Start work on class attribute access
Fix class attribute special case
Add class attribute test case
Add Python evaluation test cases
Minor refactoring
Fix class attribute type checking bug
Update test case
Add comment
Fix type of self argument in unbound methods
Fix type of unbound method with implicit signature
Add unbound method test case
Add unbound method test case
Add evaluation test case
Add unbound method test case
Add unbound method test case
Fix unbound methods of generic classes
Add static types
Add unbound method test case
Add unbound __init__ test case
Update README