Rasing Exception

You can use raise exception by using the raise statement.

print 1 raise ValueError print 2

1 ValueError

Example: Which error occur in this code?

try:     print 1/0 except ZeroDivisionError:     raise ValueError

ZeroDivisionError and ValueError

Exceptions can be raised with arguments that give detail about them. For example:

name = '12345' raise NameError('Invalid name!')

NameError: Invalid name!

In except blocks, the raise statement can be used without arguments to re-raise whatever exception occurred.

try:     num = 5/0 except:     print 'An error occurred'     raise

An error occurred ZeroDivisionError: integer division or modulo by zero