1、移除空白
1 username.strip()
2、分割
1 names = "alex,jack,rain"2 names_1 = names.split(",") # 字符串分割之后变成列表3 print(names_1)4 #输出5 ['alex', 'jack', 'rain']
3、合并列表各元素成为字符串
1 names_1 = ['alex', 'jack', 'rain'] 2 names_2 = "|".join(names_1) 3 print(type(names_1)) 4 print(names_2) 5 # 输出 6 <class 'list'> 7 alex|jack|rain 8 ##### 9 names_1 = "alex"10 names = "apple"11 names_2 = names.join(names_1)12 print(type(names_1))13 print(names_2)14 #输出15 <class 'str'>16 aapplelappleeapplex# apple作为分割符，分割names_1的各元素
4、字符串切片
1 name = "alexli"2 print(name[2:4]) #方法与列表类似3 #输出4 ex
5、字符串是否是纯数字
1 age = input("age:")2 print(type(age))3 if age.isdigit():# isdigit()用于判断输入的字符串是否为纯数字，如果是，返回为True4age = int(age)5print(type(age))6 else:7print("invaild data type")
6、其他
1 name ='alex%sdf' 2 print(name.isalnum()) 3 print(name.endswith("df"))#判断字符结尾 4 print(name.startswith("la"))#判断字符开始 5 print(name.upper().lower()) 6 print(len(name))#判断字符长度 7 print(name[0])#根据字符索引进行切片 8 #输出 9 False10 True11 False12 alex%sdf13 814 a
