code: def _get_time_utc(time_utc_str):
          
          dt = datetime.strptime(time_utc_str, TIME_FORMAT)
          return int(calendar.timegm(dt.utctimetuple()))
docs: Convert a string representation of the time (as returned by
          blockr.io api) into unix timestamp.
  
          Args:
              time_utc_str (str): String representation of the time, with the
                  format: `'%Y-%m-%dT%H:%M:%S %Z'`.
  
          Returns:
              int: Unix timestamp.