Python patterns
===============

- `comments` matches Python #-comments
- `defs` matches Python `def` lines
- `doc_strings` matches Python docstrings
- `imports` matches Python `import` lines
- `names` matches Python identifiers (and keywords) not inside strings and comments
- `string` matches Python strings
- `zap_comments` removes Python comments from matches
- `zap_strings` removes Python strings from matches
