file_cache.py 文件源码

def _to_timestamp(date):
  try:
    return (date - EPOCH).total_seconds()
  except AttributeError:
    # The following is the equivalent of total_seconds() in Python2.6.
    # See also: https://docs.python.org/2/library/datetime.html
    delta = date - EPOCH
    return ((delta.microseconds + (delta.seconds + delta.days * 24 * 3600)
             * 10**6) / 10**6)