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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 export(self, path, session):
 """Exports the module with the variables from the session in `path`. Note that it is the module definition in the ModuleSpec used to create this module that gets exported. The session is only used to provide the value of variables. Args: path: path where to export the module to. session: session where to export the variables from. Raises: RuntimeError: if there is an issue during the export. """

    if self._graph is not tf_v1.get_default_graph():
      raise RuntimeError("default graph differs from the graph where the "
                         "module was instantiated.")
    if self._graph is not session.graph:
      raise RuntimeError("session graph differs from the graph where the "
                         "module was instantiated.")
    self._impl.export(path, session)