def sign(self, message):
    'Signs a message.\n\n        Args:\n            message: bytes, Message to be signed.\n\n        Returns:\n            string, The signature of the message for the given key.\n        '
    message = _helpers._to_bytes(message, encoding='utf-8')
    return rsa.pkcs1.sign(message, self._key, 'SHA-256')
Signs a message.

Args:
    message: bytes, Message to be signed.

Returns:
    string, The signature of the message for the given key.
def sign(self, message):
    'Signs a message.\n\n        Args:\n            message: bytes, Message to be signed.\n\n        Returns:\n            string, The signature of the message for the given key.\n        '
    message = _helpers._to_bytes(message, encoding='utf-8')
    return rsa.pkcs1.sign(message, self._key, 'SHA-256')