parameters: (dt, default_timezone=None)
return_statement: return (d.microseconds + (d.seconds + d.days * 24 * 3600) * 10**6) / 10**6
docstring: Calculate the timestamp based on the given datetime instance.
  
      :type dt: datetime
      :param dt: A datetime object to be converted into timestamp
      :type default_timezone: tzinfo
      :param default_timezone: If it is provided as None, we treat it as tzutc().
                               But it is only used when dt is a naive datetime.
      :returns: The timestamp
docstring_summary: Calculate the timestamp based on the given datetime instance.
docstring_tokens: Calculate the timestamp based on the given datetime instance .
function: def datetime2timestamp(dt, default_timezone=None):
      """Calculate the timestamp based on the given datetime instance.
  
      :type dt: datetime
      :param dt: A datetime object to be converted into timestamp
      :type default_timezone: tzinfo
      :param default_timezone: If it is provided as None, we treat it as tzutc().
                               But it is only used when dt is a naive datetime.
      :returns: The timestamp
      """
      epoch = datetime.datetime(1970, 1, 1)
      if dt.tzinfo is None:
          if default_timezone is None:
              default_timezone = tzutc()
          dt = dt.replace(tzinfo=default_timezone)
      d = dt.replace(tzinfo=None) - dt.utcoffset() - epoch
      if hasattr(d, "total_seconds"):
          return d.total_seconds()  # Works in Python 2.7+
      return (d.microseconds + (d.seconds + d.days * 24 * 3600) * 10**6) / 10**6
function_tokens: def datetime2timestamp ( dt , default_timezone = None ) : epoch = datetime . datetime ( 1970 , 1 , 1 ) if dt . tzinfo is None : if default_timezone is None : default_timezone = tzutc ( ) dt = dt . replace ( tzinfo = default_timezone ) d = dt . replace ( tzinfo = None ) - dt . utcoffset ( ) - epoch if hasattr ( d , "total_seconds" ) : return d . total_seconds ( ) # Works in Python 2.7+ return ( d . microseconds + ( d . seconds + d . days * 24 * 3600 ) * 10 ** 6 ) / 10 ** 6