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'''
Smart_Strong Extension for Python-Markdown
==========================================
This extention adds smarter handling of double underscores within words.
See <https://pythonhosted.org/Markdown/extensions/smart_strong.html>
for documentation.
Original code Copyright 2011 [Waylan Limberg](http://achinghead.com)
All changes Copyright 2011-2014 The Python Markdown Project
License: [BSD](http://www.opensource.org/licenses/bsd-license.php)
'''
from __future__ import absolute_import
from __future__ import unicode_literals
from . import Extension
from ..inlinepatterns import SimpleTagPattern
SMART_STRONG_RE = r'(?<!\w)(_{2})(?!_)(.+?)(?<!_)\2(?!\w)'
STRONG_RE = r'(\*{2})(.+?)\2'
class SmartEmphasisExtension(Extension):
""" Add smart_emphasis extension to Markdown class."""
def extendMarkdown(self, md, md_globals):
""" Modify inline patterns. """
md.inlinePatterns['strong'] = SimpleTagPattern(STRONG_RE, 'strong')
md.inlinePatterns.add(
'strong2',
SimpleTagPattern(SMART_STRONG_RE, 'strong'),
'>emphasis2'
)
def makeExtension(*args, **kwargs):
return SmartEmphasisExtension(*args, **kwargs)
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