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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def seconds_left(self):
 """Remaining part of the year in seconds. In the first example, only one minute and thirty seconds of the year remain: 90 The second example shows that the 29th February is generally included: 28944000 """

        return int((self._ENDDATE.datetime -
                    Date(self).datetime).total_seconds())