This is a tiny Python implementation of a line processor with Awk-like semantics. You write a set of regex-based rules. The program loops through the lines of some input file, running the matching functions on lines that match.
μ-awk could be for you if you need a quick way to mangle some text files in Python, without writing a full blown parser. The main strength of μ-awk is that it has no dependencies except for Python itself.
We use μ-awk mainly for half-parsing Markdown files.
You derive a class from mawk.RuleSet where you decorate some of the methods with regular expressions. Those methods are then called whenever a matching line is encountered, giving you the opportunity to replace or amend the given line. This is more or less exactly how you would use a regular GNU Awk script, except now you have it with just over 150 lines of pure Python.
μ-awk is not designed for performance.
Entangled makes literate programming easier. It keeps markdown and program source in sync. This makes it more convenient to extend and debug your literate code.