Traceback (most recent call last):
File "", line 383, in format_news
File "", line 67, in __init__
File "", line 214, in _buield_ads
File "/usr/lib64/python2.7/re.py", line 151, in sub
return _compile(pattern, flags).sub(repl, string, count)
File "/usr/lib64/python2.7/re.py", line 275, in filter
return sre_parse.expand_template(template, match)
File "/usr/lib64/python2.7/sre_parse.py", line 802, in expand_template
raise error, "invalid group reference"
error: invalid group reference