Print with no () in cnb_signature method

[HomaDev]

When I used pip install liqpay-python it installed liqpay, but in cnb_signature method there is a print with no (), it looks like this

    def cnb_signature(self, params):
        params = self._prepare_params(params)
        print base64.b64encode(json.dumps(params))
        return self._make_signature(self._private_key, base64.b64encode(json.dumps(params)), self._private_key)