def get_prep_value(self, value):
		""" Return the integer value to be stored from the hex string """
		if value is None or value == "":
			return None
		if isinstance(value, six.string_types):
			value = _hex_string_to_unsigned_integer(value)
		if _using_signed_storage():
			value = _unsigned_to_signed_integer(value)
		return value
def get_prep_value ( self , value ) : if value is None or value == "" : return None if isinstance ( value , six . string_types ) : value = _hex_string_to_unsigned_integer ( value ) if _using_signed_storage ( ) : value = _unsigned_to_signed_integer ( value ) return value
Return the integer value to be stored from the hex string