• python 字符串


    #字符串
    res = 'hello,world'
    #判断字符串结尾的字母
    # print(res.endswith('w'))

    #查找字符串中的最右字母下标
    # print(res.rindex('o'))

    #字符串格式化(%s和format)******
    # result = 'my name is {name}, my age is {age}'.format(name='我爱吃西红柿', age=25)
    # result1 = 'my name is {0}, my age is {1}'.format('武动乾坤',25)
    # result = 'my name is %s, my age is %s' % ('张三丰异界游', 25)
    # result1 = 'my name is %s' % '圣墟'

    #小写字母边大写
    # print(res.swapcase())
    # print(res.upper())


    #统计字符串里字符的个数*******
    # print(res.count('l'))

    #把列表变成字符串*******
    # s = ''.join(['a','b','c'])

    #字符串替换*******
    # print(res.replace('l', 'sb', 2))

    #查找字符串中最靠左元素的下标*******
    # print(res.index('o'))

    #把字符串变成列表(以l分割点)*******
    # print(res.split('l'))

    #判断是否是抬头
    # print(res.istitle())


    #判断是否是小写
    # print(res.islower())

    #判断字符串开头字符是否是(w)
    # print(res.startswith('w'))

    #strip去除首尾字符*******
    # res1 = '=====hello,world====='
    # print(res1.strip('='))

    #去除右边的字符
    # print(res1.rstrip('='))

    #去除左边的字符
    # print(res1.lstrip('='))

    #从右往左切,以.为分割,切3刀*******
    # res1 = '192.168.1.1'
    # print(res1.rsplit('.', 4))

    #encode转码,decode解码*******
    # res1 = '你好'
    # a = res1.encode('utf-8')
    # print(a.decode('utf-8'))

    #判断是否是空格字符串,而不是判断字符串里是否有空格
    # res1 = ' '
    # print(res1.isspace())


    #find是查找字符串里的元素下标,如果没有返回-1
    # print(res.find('qq'))


    #字符串拼接*******
    # res1 = 'my name is'
    # res2 = '申晨林'
    # print(res1+res2)

    #字符串切片:[0:5]顾头不顾尾,[0:12:2]步长为2也就是隔一个取一个,[:-5]下标为-5(包括-5)往右的字符不要了,[5:]下标为5(不包括5)往左的字符不要了, [4]去字符串中下标为4的字符*******
    # print(res[0:5])
    # print(res[0:-1:2])
    # print(res[:-5])
    # print(res[5:])
    # print(res[5:][4])

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  • 原文地址:https://www.cnblogs.com/gengyanqi/p/10524212.html
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