Some have ever use pyQT table ? I am looking if it is possible to uplaod real-time data and handle them.
Check AmiBroker. Good platform to build screener. Let AmiBroker handle DB etc. The framework is very fast and efficient.
No, I can't answer that question because I have no experience with Python. But if your use-case is very specific you might want to take a step back and consider whether you actually need an "out of the box and overly complicated library". Or just build that specific software which you need for your task at hand.