class Person(object):
def __init__(self,name,gender,**kw):
self.name = name
self.gender = gender
for k in kw:
setattr(self,k,kw[k])
kwargs={'age':25,'course':'Python'}
p = Person('LiLi','man',**kwargs)
print p.name
print p.gender
print p.age
print p.course
只要用了reduce函数，那么传入一个空的list 就会出错：'reduce() of empty sequence with no initial value'
不用reduce用for循环像这样也会出错，调用一个没有任何元素的空list 就会返回所有元素乘积为1
def calc_prod(lst):
def prod():
a = 1
for i in lst:
a *= i
return a
return prod
