摘要： 浅拷贝只拷贝第一层 name=['aff','bff','cff','dff',['e','gff']]names=name.copy()name[2]='good'name[4][1]='job'print(name)print(names)第一层被拷贝了，还是原来的值，第二层只拷贝内存地址，第二 阅读全文

摘要： 切片： 顾首不顾尾： #author: janxname=["beijing","shanghai","guangzhou","shengzhen"]print(name[1:3])print(name[-2:-1])print(name[-2:])print(name[0:3])print(nam 阅读全文