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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 setStartdatetime(self, recording_start_time):
 """ Sets the recording start Time Parameters recording_start_time: datetime object Sets the recording start Time """

        if isinstance(recording_start_time,datetime):
            self.recording_start_time = recording_start_time
        else:
            self.recording_start_time = datetime.strptime(recording_start_time,"%d %b %Y %H:%M:%S")
        self.update_header()