code: def project(self):
          
          if self._project is None:
              _, self._project = google.auth.default()
          return self._project
docs: str: Default project to use for queries performed through IPython
          magics
  
          Note:
              The project does not need to be explicitly defined if you have an
              environment default project set. If you do not have a default
              project set in your environment, manually assign the project as
              demonstrated in the example below.
  
          Example:
              Manually setting the context project:
  
              >>> from google.cloud.bigquery import magics
              >>> magics.context.project = 'my-project'