code: def get_timezone_offset(ifo, dt=None):
      
      import pytz
      dt = dt or datetime.datetime.now()
      offset = pytz.timezone(get_timezone(ifo)).utcoffset(dt)
      return offset.days * 86400 + offset.seconds + offset.microseconds * 1e-6
docs: Return the offset in seconds between UTC and the given interferometer
  
      Parameters
      ----------
      ifo : `str`
          prefix of interferometer, e.g. ``'X1'``
  
      dt : `datetime.datetime`, optional
          the time at which to calculate the offset, defaults to now
  
      Returns
      -------
      offset : `int`
          the offset in seconds between the timezone of the interferometer
          and UTC