code: def decode(value):
    
    assert value, "Invalid geohash: %s"%value
    # Get the GeoHash bits
    bits = _geohash_to_bits(value)
    # Unzip the GeoHash bits.
    lon = bits[0::2]
    lat = bits[1::2]
    # Convert to lat/lon
    return (
      _bits_to_float(lon, lower=-180.0, upper=180.0),
      _bits_to_float(lat)
    )
docs: Decode a geohash. Returns a (lon,lat) pair.