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 ...

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.

Some say a set of regular expressions comprises a domain-specific language, or DSL; essentially, a mini-programming language. A full-blown programming language like Java or Python can do many things, ...