human
Solve the following python programming problem given the following code:
def _set_model(self, model) : 
    '
        Resolves embedded model class once the field knows the model it
        belongs to.

        If the model argument passed to __init__ was a string, we need
        to make sure to resolve that string to the corresponding model
        class, similar to relation fields.
        However, we need to know our own model to generate a valid key
        for the embedded model class lookup and EmbeddedModelFields are
        not contributed_to_class if used in iterable fields. Thus we
        rely on the collection field telling us its model (by setting
        our "model" attribute in its contribute_to_class method).
        ' 
    self._model = model 
    if ((model is not None) and isinstance (_resolve_lookup.embedded_model, basestring)) : 
        def _resolve_lookup(self_, resolved_model, model) : 
            self.embedded_model = resolved_model 
add_lazy_relation (model, self, self.embedded_model, _resolve_lookup) 

    
    

    Fix the buggy line: if ((model is not None) and isinstance (_resolve_lookup.embedded_model, basestring)) :
assistant
#Here is Python program to fix the buggy line: if ((model is not None) and isinstance (_resolve_lookup.

if ((model is not None) and isinstance (self.embedded_model, basestring)) :