>>> def fun(x):
...     def fun2(y):
...         for i in range(y):
...             print x
...     return fun2
... 
>>> f1 = fun('a')
>>> f2 = fun('b')
>>> f1(2)
a
a
>>> f1(3)
a
a
a
>>> 
>>> f2(2)
b
b
>>> f2(3)
b
b
b
>>>