make parameter optional python

1def myfunc(a,b, *args, **kwargs):
2      c = kwargs.get('c', None)
3      d = kwargs.get('d', None)
4      #etc
5myfunc(a,b, c='nick', d='dog', ...)

1def my_func(a = 1, b = 2, c = 3):
2	print(a + b + c)
3    
4my_func()
5#OUTPUT = 6
6
7my_func(2)
8#This changes the value of a to 2
9#OUTPUT = 7
10
11my_func(c = 2)
12#This changes the value of c to 2
13#OUTPUT = 5

1def myfunc(a,b, *args, **kwargs):
2   for ar in args:
3      print ar
4myfunc(a,b,c,d,e,f)
5

1def some_function (self, a, b, c, d = None, e = None, f = None, g = None, h = None):
2    #code

1def myfunc(a,b, *args, **kwargs):
2      c = kwargs.get('c', None)
3      d = kwargs.get('d', None)
4      #etc
5myfunc(a,b, c='nick', d='dog', ...)
6

1def some_function (self, a, b, c, d = None, e = None, f = None, g = None, h = None):
2    #code
3