In this tutorial, we'll dive into the wild world of advanced regular expression patterns in Python. From matching nested patterns to recursive regular expressions, we'll explore the limits of what's possible with Python's built-in regex library.
Matching Nested Patterns
Using the ?<pattern> modifier, you can match the first sub-pattern that matches the entire pattern. For example, ^a?b$ will match ab or aab.
But what about nested patterns? Ah, that's where things get wild!
Recursive Regular Expressions
Using the (?R1)… (?R2) syntax, you can create a recursive regular expression that matches the same pattern over and over. For example, (?R1)ab(?R1) will match abab, abbab, or any other combination of a and b you can think of.
But wait, there's more! You can even use the (?R1)… (?0) syntax to match the opposite pattern. For example, (?R1)ab(?0) will match ba, bba, or bbab.
And if you thought that was wild, just think about this: (?R1)ab(?R1)ab(?0) will match abababab, bbaabab, or bbababab.
So, are you ready to unleash the wild power of regex on Python? Let's get started!