def fact(n):
 if n == 1:
 return 1
 else:
 return fact(n-1) * n

print fact(6)

def foo(a, *alist):
 return alist[0] + alist[1]

print foo(2, 3, 4)

def bar(a, b):
 return a + b

print bar(b = 3, a = 1)

def func(a, b = 2, *alist, **kwargs):
 t = a
 t += b
 for i in alist:
 t += i

 for v in kwargs.itervalues():
 t += v

 return t

print func(1, 2)
print func(1, c = 3)
print func(1, 2, 3, c = 4)

def foo(a, b, c = 100, d = 10):
 return a + b + c + d

print foo(1, 2, d = 2)