def get_fd_error(self):
        return None
datetime -> minutes east of UTC (negative for west of UTC)
dataset/ETHPy150Open D-L/SimpleBookMarks/src/tornado/iostream.py/BaseIOStream.get_fd_error--crossover with--dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/datetime.py/tzinfo.utcoffset