I am having the same issue but with multiple symbols. The StockDataStream - subscribe_bars document states that the subcribe_bars can take tuple but when I use test it I get a error: invalid syntax (400). It only workd with single symbol. Any help would be much appreciated.
*subscribe_quotes(handler: Callable, symbols ) → None
Subscribe to quote data for symbol inputs
PARAMETERS:
** handler (Callable) – The coroutine callback function to handle live quote data*
** symbols – Variable string arguments for ticker identifiers to be subscribed to.