python check exception type 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: how to use except statement in python

>>> def divide(x, y):
...     try:
...         result = x / y
...     except ZeroDivisionError:
...         print("division by zero!")
...     else:
...         print("result is", result)
...     finally:
...         print("executing finally clause")
...
>>> divide(2, 1)
result is 2.0
executing finally clause
>>> divide(2, 0)
division by zero!
executing finally clause
>>> divide("2", "1")
executing finally clause
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in divide
TypeError: unsupported operand type(s) for /: 'str' and 'str'

Example 3: python check for exception

try: # put here the code that you expect to error 
  # code
except ValueError: # if you want to catch a ValueError
  # NOTE: you CANNOT catch a syntax error 
  # (UNLESS you are trying to execute code from a string with eval())
  
  # code if python caught the exception
except NameError: # you can catch multiple types of errors!
  # TIP: you can leave the error type blank to make python catch all types of errors!
  
  # code if another exception is caught (this is pretty much a modified if statement)
else: # if no error has been caught do the following:
  
  # code if no exception has been caught