Python--字符串基本操作

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Huanglinsheng

# name.capitalize()  首字母大写
# name.casefold()   大写全部变小写
# name.center(50,"-")  输出 '---------------------Alex Li----------------------'
# name.count('lex') 统计 lex出现次数
# name.encode()  将字符串编码成bytes格式
# name.endswith("Li")  判断字符串是否以 Li结尾"Alex\tLi".expandtabs(10) 输出'Alex      Li'， 将\t转换成多长的空格
# name.find('A')  查找A,找到返回其索引， 找不到返回-1

'''format'''
'''
msg = "my name is {},my age is {}"
msg.format("hls",22)
print(msg.format("hls",22))

msg = "my name is {1},my age is {0}"
msg.format("hls",22)
print(msg.format("hls",22))

msg = "my name is {name},my age is {age}"
msg.format(name="hls",age=22)
print(msg.format(name="hls",age=22))


msg = "my name is {},my age is {}"
msg.format_map({'name':'alex','age':22})
'''

# msg.index('a')  返回a所在字符串的索引
# '9aA'.isalnum()   True
#
# '9'.isdigit() 是否整数
# name.isnumeric
# name.isprintable
# name.isspace
# name.istitle
# name.isupper
#  "|".join(['alex','jack','rain'])
# 'alex|jack|rain'


#字符替换
intab = "aeiou"
outtab = "12345"
trantab = str.maketrans(intab,outtab)
str = "this is string example....wow!!!"
str.translate(trantab)
print(str.translate(trantab))


#msg.swapcase 大小写互换