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True 4 age = int(age) 5 print(type(age)) 6 else: 7 print("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 False 10 True 11 False 12 alex%sdf 13 8 14 a