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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 add_date_time_original(self, date_time, time_format='%Y:%m:%d %H:%M:%S.%f'):
 """Add date time original."""

        try:
            DateTimeOriginal = date_time.strftime(time_format)[:-3]
            self._ef['Exif'][piexif.ExifIFD.DateTimeOriginal] = DateTimeOriginal
        except Exception as e:
            print_error("Error writing DateTimeOriginal, due to " + str(e))