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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 process(self):
 """ Calls the process endpoint for all locales of the asset. API reference: https://www.contentful.com/developers/docs/references/content-management-api/#/reference/assets/asset-processing """


        for locale in self._fields.keys():
            self._client._put(
                "{0}/files/{1}/process".format(
                    self.__class__.base_url(
                        self.space.id,
                        self.id,
                        environment_id=self._environment_id
                    ),
                    locale
                ),
                {},
                headers=self._update_headers()
            )
        return self.reload()