def __le__(self, other):
if not isinstance(other, interface.DateTimeValues):<EOL><INDENT>raise ValueError('<STR_LIT>')<EOL><DEDENT>return isinstance(other, Never)<EOL>
Determines if the date time values are less than or equal to other.

        Args:
          other (DateTimeValues): date time values to compare against.

        Returns:
          bool: True if the date time values are greater than or equal to other.

        Raises:
          ValueError: if other is not an instance of DateTimeValues.