1. ['0','1','2'] -> [0,1,2]  

1. [int(x) for x in list]  

1. map(int, list)  

1. list = [[0,1,2],[3,1,4]]  

1. >>> list = [[0,1,2],[3,1,4]]  

2. >>> [sum(x) for x in list]  

3. [3, 8]  

4. >>> map(sum,list)  

5. [3, 8]  

1. >>> list = [[0,1,2],[3,1,4]]  

2. >>> zip(*list)  

3. [(0, 3), (1, 1), (2, 4)]  

4. >>> [sum(x) for x in zip(*list)]  

5. [3, 2, 6]  

6. >>> map(sum,zip(*list))  

7. [3, 2, 6]

1. >>> x=[1,2,3]  

2. >>> y=[4,5,6]  

3. >>> zipped = zip(x,y)  

4. >>> zipped  

5. [(1, 4), (2, 5), (3, 6)]  

6. >>> x2,y2=zip(*zipped)  

7. >>> x2  

8. (1, 2, 3)  

9. >>> y2  

10. (4, 5, 6)  

11. >>> x3,y3=map(list,zip(*zipped))  

12. >>> x3  

13. [1, 2, 3]  

14. >>> y3  

15. [4, 5, 6]    

第一个参数接收一个函数名，第二个参数接收一个可迭代对象

1. 

   ls = [1,2,3] rs = map(str, ls)   #打印结果 ['1', '2', '3'] lt = [1, 2, 3, 4, 5, 6] def add(num):    return num + 1   rs = map(add, lt) print rs #[2,3,4,5,6,7]