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Detailed explanation of python-regular expression re module
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Regular expressions are a small, highly specialized programming language that is not unique to Python. It is a basic and important part of many programming languages. In python, it is mainly implemented through the re module.
Regular expression patterns are compiled into a series of bytecodes and then executed by a matching engine written in C. So what are the common usage scenarios of regular expressions?
For example, specify rules for the corresponding set of strings you want to match;
The string set can include e-mail addresses, Internet addresses, phone numbers, or some string sets customized according to needs;
Of course, you can also judge whether a string set conforms to the matching rules we defined;
Find the part of the string that matches the rule;
A series of text processing such as modification and cutting;