human
Solve the following python programming problem given the following code:
def parse_signature(sig_text, name, pos) : 
    tokens = tokenize.generate_tokens (StringIO (sig_text).readline) 
    sig_args = [] 
    var_arg = None 
    var_kw = None 
    defaults = { 
        
} 
    def get_token(pos = False) : 
        try : 
            (tok_type, tok_string, (srow, scol), (erow, ecol), line) = next (tokens) 
except StopIteration : 
            return (tokenize.ENDMARKER, '') 
if pos : 
            return (tok_type, tok_string, (srow, scol), (erow, ecol)) 
else : 
            return (tok_type, tok_string) 
while 1 : 
        var_arg_type = None 
        (tok_type, tok_string) = get_token () 
        if (tok_type == tokenize.ENDMARKER) : 
            break 
if ((tok_type == tokenize.OP) and ((tok_string == '*') or (tok_string == '**'))) : 
            var_arg_type = tok_string 
            (tok_type, tok_string) = get_token () 
if (tok_type != tokenize.NAME) : 
            raise TemplateError (('Invalid signature: (%s)' % sig_text), position = pos, name = name) 
var_name = tok_string 
        (tok_type, tok_string) = get_token () 
        if ((tok_type == tokenize.ENDMARKER) or ((tok_type == tokenize.OP) and (tok_string == ','))) : 
            if (var_arg_type == '*') : 
                var_arg = var_name 
else : 
                if (var_arg_type == '**') : 
                    var_kw = var_name 
else : 
                    sig_args.append (var_name) 
if (tok_type == tokenize.ENDMARKER) : 
                break 
continue 
if (var_arg_type is not None) : 
            raise TemplateError (('Invalid signature: (%s)' % sig_text), position = pos, name = name) 
if ((tok_type == tokenize.OP) and (tok_string == '=')) : 
            nest_type = None 
            unnest_type = None 
            nest_count = 0 
            start_pos = end_pos = None 
            parts = [] 
            while 1 : 
                (tok_type, tok_string, s, e) = get_token (True) 
                if (start_pos is None) : 
                    start_pos = s 
end_pos = e 
                if ((tok_type ==...

    
    

    Fix the buggy line: if ((not sig_args) and (tok_type == tokenize.OP) and (tok_string in ('(', '[', '{'))) :
assistant
#Here is Python program to fix the buggy line: if ((not sig_args) and (tok_type == tokenize.

if ((not nest_count) and (tok_type == tokenize.OP) and (tok_string in ('(', '[', '{'))) :