human
Solve the following python programming problem given the following code:
@ property 
def _setter(self) : 
    '
        Return a function object suitable for the "set" side of the attribute
        property descriptor.
        ' 
    def set_attr_value(obj, value) : 
        if ((value is None) or (value == self._default)) : 
            if (self._clark_name in obj.attrib) : 
                del obj.attrib [self._clark_name] 
return 
str_value = self._simple_type.to_xml (value) 
        obj.set (self._clark_name, str_value) 
return self 

    
    

    Fix the buggy line: return self
assistant
#Here is Python program to fix the buggy line: return self
.

return def set_attr_value(