python lambda

>>> f=lambda x,y,z:x+y+z
>>> f(1,2,3)
6
>>> f=lambda x,y,z:x+y+x
>>> f(1,2,3)
4
>>> 
>>> n=5
>>> reduce(lambda x,y:x*y,range(1,n+1))
120
>>> 
>>> def action(x):
...     return lambda y:x+y
... 
>>> a=action(2)
>>> a(22)
24
>>> b=lambda x:lambda y:x+y
>>> a=b(3)
>>> a(2)
5
>>> (b(2))(2)
4
>>> 
>>> 
>>> n = 5
>>> print reduce(lambda x, y: x * y, range(1, n + 1))
120
>>> 
>>> m = 2
>>> n = 5
>>> print reduce( lambda x, y: x * y, range( 1, n + 1 ), m )  # 240
240