def module(self):
        """The module in which the Class is defined.

        Python equivalent of the CLIPS defglobal-module command.

        """
        modname = ffi.string(lib.EnvDefclassModule(self._env, self._cls))
        defmodule = lib.EnvFindDefmodule(self._env, modname)

        return Module(self._env, defmodule)