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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 _DateToEpoch(date):
 """Converts python datetime to epoch microseconds."""

  tz_zero = datetime.datetime.utcfromtimestamp(0)
  diff_sec = int((date - tz_zero).total_seconds())
  return diff_sec * 1000000