常用：分割、长度、索引、切片r=(1,2,3,4,5)#只读列表元组name="liangml"stripusername=input("user:")ifusername.strip()=="liangml":#strip可以将输入前后的空格都换掉print("welcome")splitnames="liangml","tom","jack"name2=names.split(",")#split是names拆分开来（得到一个列表）print("|".join(name2))#join是将name2结果以|形式合并到一起print(""inname)#有没有空格capitalizeprint(name.capitalize())#capitalize是将名字的首字母大写format#format字符串两种赋值方式msg="Hello,{name},It'sbeenalong{age}sincelasttimesopke...."#msg2=msg.format(name="zhangsan",age=111)#print(msg2)msg2="lisi{0},dddd{1}"print(msg2.format("liangml",22))centerprint(name[2:4])print(name.center(40,"-"))#center可以指定长度,将字符串两边的长度均匀的分开findprint(name.find("a"))#find查找赋值中有几个包含字符串isdigitage=input("yourage:")ifage.isdigit():#isdigit判断他是否为数字age=int(age)else:print("invaliddatatype")isalnumname="liangml!dfs"print(name.isalnum())#不容许复制里面有特殊字符endswith、startswithprint(name.endswith("dfsd"))print(name.startswith("dfsfds"))upper、lowerprint(name.upper().lower())#upper赋值全部大写，lower全部变小