Retrieves environment variables from a namespace.

        Args:
            prefix (str): The prefix, without a trailing underscore.

        Returns:
            list: A list of environment variable keys and values.

def get_environ(cls, prefix):
        """Retrieves environment variables from a namespace.

        Args:
            prefix (str): The prefix, without a trailing underscore.

        Returns:
            list: A list of environment variable keys and values.

        """
        return ((key[len(prefix) + 1:], value)
                for key, value in os.environ.items()
                if key.startswith('%s_' % prefix))