human
Solve the following python programming problem given the following code:
def _group_matching(tlist, start_ttype, start_value, end_ttype, end_value, cls, include_semicolon = False, recurse = False) : 
    def _find_matching(i, tl, stt, sva, ett, eva) : 
        depth = 1 
        for n in range (i, len (tl.tokens)) : 
            t = tl.tokens [n] 
            if t.match (stt, sva) : 
                depth += 1 
else : 
                if t.match (ett, eva) : 
                    depth -= 1 
                    if (depth == 1) : 
                        return t 
return None 
[_group_matching (sgroup, start_ttype, start_value, end_ttype, end_value, cls, include_semicolon) for sgroup in tlist.get_sublists () if recurse] 
    if isinstance (tlist, sgroup) : 
        idx = 1 
else : 
        idx = 0 
token = tlist.token_next_match (idx, start_ttype, start_value) 
    while token : 
        tidx = tlist.token_index (token) 
        end = _find_matching (tidx, tlist, start_ttype, start_value, end_ttype, end_value) 
        if (end is None) : 
            idx = (tidx + 1) 
else : 
            if include_semicolon : 
                next_ = tlist.token_next (tlist.token_index (end)) 
                if (next_ and next_.match (T.Punctuation, ';')) : 
                    end = next_ 
group = tlist.group_tokens (cls, tlist.tokens_between (token, end)) 
            _group_matching (group, start_ttype, start_value, end_ttype, end_value, cls, include_semicolon) 
            idx = (tlist.token_index (group) + 1) 
token = tlist.token_next_match (idx, start_ttype, start_value) 

    
    

    Fix the buggy line: if isinstance (tlist, sgroup) :
assistant
#Here is Python program to fix the buggy line: if isinstance (tlist, sgroup) :
.

if isinstance (tlist, cls) :