1# ext/preprocessors.py
2# Copyright 2006-2023 the Mako authors and contributors <see AUTHORS file>
3#
4# This module is part of Mako and is released under
5# the MIT License: http://www.opensource.org/licenses/mit-license.php
6
7"""preprocessing functions, used with the 'preprocessor'
8argument on Template, TemplateLookup"""
9
10import re
11
12
13def convert_comments(text):
14    """preprocess old style comments.
15
16    example:
17
18    from mako.ext.preprocessors import convert_comments
19    t = Template(..., preprocessor=convert_comments)"""
20    return re.sub(r"(?<=\n)\s*#[^#]", "##", text)
21