weixin_42200930的博客

这里写目录标题[n: ][: n][-n:][:-n][: : n][: : -n][n: m: k][n: ][n: ]意思是取列表中第n项（从0数起）到最后一项，包含第0项和最后一项exp:x = [0,1,2,3,4,5,6,7,8,9]y = x[0:]z = x[3:]print(x) print(y)print(z)result:[0, 1, 2, 3, 4, 5, 6, 7, 8, 9][0, 1, 2, 3, 4, 5,