.. highlight:: c++

.. feed_date:: 2011-01-08 21:00

.. summary::

  `*args` : list
  `**kwargs` : dictionnary


How to use `*args` and `**kwargs`
=================================

`*args` and `**kwargs` are 2 useful python mechanisms to define and call methods or functions with a variable number of arguments.


`*args` is a list : ::

  def test_var_args(*args):
      for arg in args:
          print("arg:", arg)
   
  test_var_arg(172, "3", "foo", [1,2,3])


`**kwargs` is a dictionary-like structure : ::

  def test_var_kwargs(**kwargs):
      for key in kwargs:
          print("arg: %s = %s" % (key, kwargs[key]))
   
  test_var_kwargs(key1=3, key2="foo", foo=[1,2])