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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(self, app_id, view_specifier):
 """ Retrieve the definition of a given view, provided the app_id and the view_id :param app_id: the app id :param view_specifier: Can be one of the following: 1. The view ID 2. The view's name 3. "last" to look up the last view used """

        return self.transport.GET(url='/view/app/{}/{}'.format(app_id, view_specifier))