python学习之字符串转换

配置环境：python 3.6   Python编辑器：PyCharm

代码如下：

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

def strCase():
    "字符串大小写转换"
    print("演示字符串大小写转换")
    print("演示字符串S赋值为：'  ThIs is a PYTHON  '")
    S = '  ThIs is a PYTHON  '
    print("大写转换成小写：\tS.lower() \t= %s"%(S.lower()))
    print("小写转换成大写：\tS.upper() \t= %s"%(S.upper()))
    print("大小写转换：\t\tS.swapcase() \t= %s"%(S.swapcase()))
    print("首字母大写：\t\tS.title() \t= %s"%(S.title()))
    print('\n')


def strFind():
    "字符串搜索、替换"
    print("演示字符串搜索、替换等")
    print("演示字符串S赋值为：'  ThIs is a PYTHON  '")
    S = '  ThIs is a PYTHON  '
    print("字符串搜索：\t\tS.find('is') \t= %s"%(S.find('is')))
    print("字符串统计：\t\tS.count('s') \t= %s"%(S.count('s')))
    print("字符串替换：\t\tS.replace('Is','is') = %s"%(S.replace('Is','is')))
    print("去左右空格：\t\tS.strip() \t=#%s#"%(S.strip()))
    print("去左边空格：\t\tS.lstrip() \t=#%s#"%(S.lstrip()))
    print("去右边空格：\t\tS.rstrip() \t=#%s#"%(S.rstrip()))
    print('\n')


def strSplit():
    "字符串分割、组合"
    print("演示字符串分割、组合")
    print("演示字符串S赋值为：'  ThIs is a PYTHON  '")
    S = '  ThIs is a PYTHON  '
    print("字符串分割：\t\tS.split() \t= %s"%(S.split()))
    print("字符串组合1： '#'.join(['this','is','a','python']) \t= %s"%('#'.join(['this','is','a','python'])))
    print("字符串组合2： '$'.join(['this','is','a','python']) \t= %s"%('$'.join(['this','is','a','python'])))
    print("字符串组合3： ' '.join(['this','is','a','python']) \t= %s"%(' '.join(['this','is','a','python'])))
    print('\n')

def strTest():
    "字符串测试"
    print("演示字符串测试")
    print("演示字符串S1赋值为：'abcd'")
    S1 = 'abcd'
    print("测试S.isalpha() = %s"%(S1.isalpha()))
    print("测试S.isdigit() = %s"%(S1.isdigit()))
    print("测试S.isspace() = %s"%(S1.isspace()))
    print("测试S.islower() = %s"%(S1.islower()))
    print("测试S.isupper() = %s"%(S1.isupper()))
    print("测试S.istitle() = %s"%(S1.istitle()))

if __name__ == '__main__':
    strCase()
    strFind()
    strSplit()
    strTest()