human
Solve the following python programming problem given the following code:
def BoolParam(default, is_valid = None, allow_override = True) : 
    def booltype(s) : 
        if (s in ['False', 'false', '0', False]) : 
            return False 
else : 
            if (s in ['True', 'true', '1', True]) : 
                return True 
def is_valid_bool(s) : 
        if (s in ['False', 'false', '0', 'True', 'true', '1', False, True]) : 
            return True 
else : 
            return False 
if (booltype is None) : 
        is_valid = is_valid_bool 
return TypedParam (default, booltype, is_valid, allow_override = allow_override) 

    
    

    Fix the buggy line: if (booltype is None) :
assistant
#Here is Python code to fix the buggy line: if (booltype is None) :
.

if (is_valid is None) :