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字符串是 Python 中最常用的数据类型。我们可以使用单引号 ' 或双引号" 来创建字符串。 阅读全文
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By the way, a string is a sequence of characters. In Python, strings are enclosed inside single quotes, double quotes, or triple quotes. 阅读全文
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pattern1='(([01]{0,1}\d{0,1}\d|2[0-4]\d|25[0-5])\.){3}([01]{0,1}\d{0,1}\d|2[0-4]\d|25[0-5])' 阅读全文
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The first thing you’ll need to do is use the built-in python open file function to get a file object. When you use the open function, it returns somet 阅读全文