python3对序列求绝对值

http://www.cnblogs.com/itdyb/p/5731804.html

一开始我是这样写的，据说这样写python2是可以的：

myList = [-1,2,-3,4,-5,6]

absList = map(abs, myList)

print(absList)

但是在python3中出错了

>>>map object at 0x000000001470D208

所以改成了

myList = [-1,2,-3,4,-5,6]

absList = map(abs, myList) #对于Python3.x需要用list函数对map的返回值转换为列表

print(list(absList))

>>>[1, 2, 3, 4, 5, 6]

完美解决