'Return the nodata value for this band, or None if it isn\'t set.'

@property
def nodata_value(self):

    nodata_exists = c_int()
    value = capi.get_band_nodata_value(self._ptr, nodata_exists)
    if (not nodata_exists):
        value = None
    elif (self.datatype() in GDAL_INTEGER_TYPES):
        value = int(value)
    return value
