求助python，map filter
map，filter方法应该会返回一个列表。
但是在我这里，它们总是返回：
<map object at 0x0000000002A2C978>
<filter object at 0x0000000002A2C9E8>
我用的python3.1， 这个也是版本的变动导致的吗？
def map_func(lis):
return lis + 1
li = [1,2,3,4,5]
map_l = map(map_func, li) #将li中所有的数都+1
print (map_l)
就是这个小程序，怎么加print？
看看这个
What's New In Python 3.0 http://blog.csdn.net/t_huanghai/archive/2008/12/04/3443782.aspx
里面有对python3.0 map（）函数介绍，参考下 ，试试 print list(map_l)
map() and filter() return iterators. If you really need a list, a quick fix is e.g. list(map(...)), but a better fix is often to use a list comprehension (especially when the original code uses lambda), or rewriting the code so it doesn’t need a list at all. Particularly tricky is map() invoked for the side effects of the function; the correct transformation is to use a regular for loop (since creating a list would just be wasteful).
What's New In Python 3.0
invalid syntax
看来，应该照它说的， 用for loop
谢谢小康
print (list（map_l）)
correct format. mark it.
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