How to use the regular expression functions provided by the ‘re’ library to match, search, and replace text in your Python programs. Regular expressions, or “regex,” is a system for finding complex ...

This module is targeted at CPython. It expects that all codepoints are the same width, so it won't behave properly with PyPy outside U+0000..U+007F because PyPy stores strings as UTF-8. The regex ...

Below, I will roughly follow how I arranged the lecture on regular expressions, while also providing the relevant functions in the code. A regular expression is equivalent to some finite automaton.