how to check the last error message python code example

Example 1: except as Exception:

>>> def catch():
...     try:
...         asd()
...     except Exception as e:
...         print e.message, e.args
... 
>>> catch()
global name 'asd' is not defined ("global name 'asd' is not defined",)

Example 2: python: raise error

class MyError(TypeError):
    pass

raise MyError('An error happened')