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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 module(self):
 """ Returns the module name of Recipe. This actually represents the file basename of a recipe. """

        if not hasattr(self, '_module'):
            self._module = re.search('[a-z]+\.([a-z]+)\.([a-z]+)', str(self.__class__), re.IGNORECASE).group(1)

        return self._module