Python, for all its power and popularity, has long lacked a form of flow control found in other languages—a way to take a value and match it elegantly against one of a number of possible conditions.

Regular expressions, or “regex,” is a system for finding complex patterns in text ... You can work with match objects using these methods: When you create a Python regex, you can pass a ...

When the regular expression that you use to match the section to delete does not change ... output = matcherStartMiddle.replaceFirst(""); In Python it takes us four lines: PATTERN_END = ...

You can think of them as searching for a pattern, rather than a specific ... In this article, Hamlet Batista demonstrated how to use regex in Python to analyze server log files, for example.

Read chapter 12 from the book Programming in Python ... regex will match any line whatsoever, including blank lines because the meaning is “match any number of #s”—and that includes none. As a rule of ...