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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_model_details(self, model_name):
 """Get details of the specified model from CloudML Service. Args: model_name: the name of the model. It can be a model full name ("projects/[project_id]/models/[model_name]") or just [model_name]. Returns: a dictionary of the model details. """

    full_name = model_name
    if not model_name.startswith('projects/'):
      full_name = ('projects/%s/models/%s' % (self._project_id, model_name))
    return self._api.projects().models().get(name=full_name).execute()