human
Solve the following python programming problem given the following code:
def _get_udfs(self, cur, klass) : 
    from ibis.expr.rules import varargs 
    from ibis.expr.datatypes import validate_type 
    def _to_type(x) : 
        ibis_type = udf._impala_type_to_ibis (x.lower ()) 
        return validate_type (ibis_type) 
tuples = cur.fetchall () 
    if (len (tuples) > 0) : 
        result = [] 
        for tup in tuples : 
            (out_type, sig) = tup [: 2] 
            (name, types) = _split_signature (sig) 
            types = _type_parser (t).types 
            inputs = [] 
            for arg in types : 
                argm = _arg_type.match (arg) 
                (var, simple) = argm.groups () 
                if simple : 
                    t = _to_type (simple) 
                    inputs.append (t) 
else : 
                    t = _to_type (var) 
                    inputs = varargs (t) 
                    break 
output = udf._impala_type_to_ibis (out_type.lower ()) 
            result.append (klass (inputs, output, name = name)) 
return result 
else : 
        return [] 

    
    

    Fix the buggy line: types = _type_parser (t).types
assistant
#Here is Python code to fix the buggy line: types = _type_parser (t).

types = _type_parser (types).types