Python comes with regex support out of the box, as part of its standard library. Here, we’ll take a quick tour of the Python regular expression library and how to get the most out of it.

Regular expressions 101 Let’s start simple. Suppose you want to search for a string with the word “cat” in it; your regular expression would simply be “cat”. If your search is case ...

The code is surprisingly short, but don’t expect all the bells and whistles you might find in Python or even Perl. In the hands of the skilled, regular expressions are very powerful and offer a ...

Chapter 12: Regular Expressions Python’ s Regular Expression Language The Regular Expression Module A regular expression is a compact notation for representing a collection of strings. What makes ...

Regular expressions — the things you feed to programs like grep — are a bit like riding a bike. It seems impossible until you learn to do it, and then it’s easy. Part of their bad… ...

For testing or debugging regular expressions I generally use this handy dashboard widget (for Mac) or the Python interactive shell. There are many regular expression testers on-line and even ...