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 ...

Quantifiers. A quantifier has the form {m,n} where m and n are the minimum and maximum times the expression the quantifier applies to must match. For example, both e{1,1}e{1,1} and e{2,2} match feel, ...

In the above example we’re using simple strings as our match targets, but more complex matches are possible. In fact, the chief use case for structural pattern matching is to match patterns of ...