# Regular expressions (called REs, or regexes, or regex patterns) are essentially a tiny, highly specialized programming language embedded inside Python # and made available through the re module.

In Python, if we prefix a string with an r, we are telling Python that we mean exactly what we are typing. For example, '\t' is a string string with one tab character, whereas r'\t' is a string with ...

How to use the regular expression functions provided by the ‘re’ library to match, search, and replace text in your Python programs.

String manipulation is always resource-intensive, but compiled regex in Python and Java can help keep performance issues at bay.