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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 get_dockercfg_credentials(self, docker_registry):
 """ Read the .dockercfg file and return an empty dict, or else a dict with keys 'basic_auth_username' and 'basic_auth_password'. """

        if not self.registry_secret_path:
            return {}

        dockercfg = Dockercfg(self.registry_secret_path)
        registry_creds = dockercfg.get_credentials(docker_registry)
        if 'username' not in registry_creds:
            return {}

        return {
            'basic_auth_username': registry_creds['username'],
            'basic_auth_password': registry_creds['password'],
        }