If your goal can be accomplished with string methods, you should use them. They’re fast and simple and easy to read, and there’s a lot to be said for fast, simple, readable code. But if you find yourself using a lot of different string functions with if statements to handle special cases, or if you’re chaining calls to split() and join() to slice-and-dice your strings, you may need to move up to regular expressions.
Regular expressions are a powerful and (mostly) standardized way of searching, replacing, and parsing text with complex patterns of characters. Although the regular expression syntax is tight and unlike normal code, the result can end up being more readable than a hand-rolled solution that uses a long chain of string functions. There are even ways of embedding comments within regular expressions, so you can include fine-grained documentation within them.
-☞If you’ve used regular expressions in other languages (like Perl 5), Python’s syntax will be very familiar. Read the summary of the
remodule to get an overview of the available functions and their arguments. +☞If you’ve used regular expressions in other languages (like Perl, JavaScript, or PHP), Python’s syntax will be very familiar. Read the summary of the
remodule to get an overview of the available functions and their arguments.
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