python3對序列求絕對值

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

 

 

一開始我是這樣寫的，據說這樣寫python2是可以的：

myList = [-1,2,-3,4,-5,6]
absList = map(abs, myList)                                                    
print(absList)

但是在python3中出錯了

>>>map object at 0x000000001470D208

所以改成了

myList = [-1,2,-3,4,-5,6]
absList = map(abs, myList)       #對於Python3.x需要用list函數對map的返回值轉換為列表
print(list(absList))

 

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

 

完美解決