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 ...

Tony Northrup is a developer, security consultant and author with more than 10 years of professional experience developing applications for Microsoft Windows. Developers frequently need to process ...

I'm wearing my regex dunce cap again. I want to return a positive match if I find "this" in a string, but not if I find "this" and also "that" in the string. Put another way: I want to return a ...

Regular expressions are like power tools: They may look scary, but are easy to use once you understand their basic building blocks. Regular expressions -- those scary strings that might as well be ...

The String.split methods can be very convenient for easily splitting a provided String based on a provided regular expression String. The only trick is figuring out a regular expression token to use ...

Even though it has somewhat of a checkered reputation, being able to wield it will save you a ton of time. There's a saying that I've heard numerous times about regular expressions (regex). It goes ...

Regular expressions come in handy for all varieties of text processing, but are often misunderstood--even by veteran developers. Here's a look at intermediate-level regular expressions and what they ...

As the title implies, I want a quick way to determine if a string contains unprintable characters, or, conversely, if it contains only printable characters. This would include printable unicode/wide ...