Traceback (most recent call last):
File "./prog.py", line 2, in <module>
File "/usr/lib/python3.7/re.py", line 173, in match
return _compile(pattern, flags).match(string)
File "/usr/lib/python3.7/re.py", line 286, in _compile
p = sre_compile.compile(pattern, flags)
File "/usr/lib/python3.7/sre_compile.py", line 764, in compile
p = sre_parse.parse(p, flags)
File "/usr/lib/python3.7/sre_parse.py", line 930, in parse
p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)
File "/usr/lib/python3.7/sre_parse.py", line 426, in _parse_sub
not nested and not items))
File "/usr/lib/python3.7/sre_parse.py", line 685, in _parse
raise source.error(msg, len(name) + 1)
re.error: bad character in group name 'slug:slug' at position 5