code: def systemEventDF(token='', version=''):
      '''The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result
      '''
      df = pd.io.json.json_normalize(systemEvent(token, version))
      _toDatetime(df)
      return df systemEventDF(token='', version=''):
      '''The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result
      '''
      df = pd.io.json.json_normalize(systemEvent(token, version))
      _toDatetime(df)
      return df
docs: The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result