Bug: error with modifying orders in Binance Python Derivatives Trading (USDS-M Futures) SDK #519
Description
Bug: modify_order WS API SDK — price is required but conflicts with price_match
The bug is in the method websocket_api.modify_order(). According to the API documentation, price and price_match "can't be passed together." This creates an impossible situation: when using price_match=QUEUE, we must omit price per the API docs, but the SDK requires price and raises an error if it's None or omitted. Passing price="" or price=None alongside price_match either fails validation or gets rejected by the server.
Expected behavior: price should be Optional (defaulting to None) so that price_match can be used independently, matching the REST API behavior where price='' with price_match="QUEUE" works correctly.