python: Exceptions
1. what are exceptions and how errors propagate through the call stack
2. try except else finally, forms of except, except ordering and 'raise'
3. exception class hierarchy and Exception.mro - avoid bare except
4. Exception _init_
5. chaining exceptions and why we chain them with 'from'
6. Instantiating Exceptions and self.args
7. Traceback Objects and super()
Mistakes:
'super' is a function provided by 'builtins' or '__builtins__' (py2)
NameError is generated when a name is not defined like x.a where x doesn't exist in the current Namespace. AttributeError is when the lookup of 'a' fails.
It's Foo.mro() to display the mro for a class or Foo.__mro__ There is NO mro() provided by 'builtins'