def from_unix_epoch_time(ms):

    if isinstance(ms, six.string_types):
        ms = float(ms)
    return from_unix_epoch_time_secs(ms/1000.0)
Returns a Datetime object given milliseconds since midnight Jan 1, 1970.
dataset/ETHPy150Open Sage-Bionetworks/synapsePythonClient/synapseclient/utils.py/from_unix_epoch_time