Python中的文本替换

发布时间:2019-08-27 08:16:40编辑:auto阅读(1814)

    文本替换是字符串的基本操作,Python的str提供了replace方法:

    src = '那个人看起来好像一条狗,哈哈'
    print(src.replace(',哈哈', '.'))

    上面代码最后的输出结果是:

    那个人看起来好像一条狗.

    对于习惯了Java中的replace,Python的replace用起来有些不适应,因为后者不支持直接使用正则表达式。要实现通过正则表达式的替换,可以配合Python的正则表达式模块使用。比如:

    """
    替换掉字符串value内竖线之后的的内容
    """
    import re
    
    src = '[{"name":"date","value":"2017数据"},{"name":"年收入","value":"3000|{"url":"http://www.abc.com/chart/income","x":"0","y":"456.172820"}"},{"name":"税款","value":"-"},{"name":"人数","value":"3419"},{"name":"部门","value":"27|{"url":"http://www.abc.com/department/list","x":"0","y":"155.852820"}"},{"name":"部门营收","value":"-"}]'
    
    #通过则表达式查找,如果有多个匹配,只能获取到最后一个
    matches = re.search('\|{.*?"}', src)
    while matches is not None:
        src = src.replace(matches.group(0), '')
        matches = re.search('\|{.*?"}', src)
    
    print(src)

    最后的结果:

    [{"name":"date","value":"2017数据"},{"name":"年收入","value":"3000"},{"name":"税款","value":"-"},{"name":"人数","value":"3419"},{"name":"部门","value":"27"},{"name":"部门营收","value":"-"}]

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