Python: list=[['1','2'],['3','4'],['5','6']]想转化list=[[1,2...答:list1=[['1','2'],['3','4'],['5','6']]list2 = [[int(x),int(y)] for x,y in list1]#huozhe list2 = [map(int,[x,y]) for x,y in list1]#huozhe list2 = map( lambda x: map(int,x),list1)
python list=[1,2,3,4,5,6,7,8] tuple=(1,2,3,4,5,6,7,8) list[0...答:其实你最好安装环境自己试一下,这样能得到结果,也能加深对python的理解:In [1]: a=[1,2,3,4,5,6,7,8]In [2]: b=(1,2,3,4,5,6,7,8)In [3]: a[0::2]Out[3]: [1, 3, 5, 7]In [4]: b[0::2]Out[4]: (1, 3, 5, 7)In [5]:因为list和tuple是python的...
python语法问题:关于在list中使用for循环答:>>> li = [1, 9, 8, 4]>>> [elem*2 for elem in li][2, 18, 16, 8]>>> li [1, 9, 8, 4]>>> li = [elem*2 for elem in li]>>> li [2, 18, 16, 8]为了便于理解它,让我们从右向左看。li 是一个将要映射的 list。Python 循环遍历 li 中的每个元素。对每个...