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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 AmericanDateToEpoch(self, date_str):
 """Take a US format date and return epoch."""

    try:
      epoch = time.strptime(date_str, "%m/%d/%Y")
      return int(calendar.timegm(epoch)) * 1000000
    except ValueError:
      return 0