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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 options(self):
 """ Reads all EMAIL_ options and set default values. """

        config = self._config
        o = {}
        o.update(self._default_smtp_options)
        o.update(self._default_message_options)
        o.update(self._default_backend_options)
        o.update(get_namespace(config, 'EMAIL_', valid_keys=o.keys()))
        o['port'] = int(o['port'])
        o['timeout'] = float(o['timeout'])
        return o