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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 load_module(self, mod):
 """ Load the extension using the load_dynamic method. """

        try:
            return sys.modules[mod]
        except KeyError:
            pass

        lib = ExtensionImporter.extension_modules[mod]
        m = imp.load_dynamic(mod, lib)
        sys.modules[mod] = m
        return m