[Feature]: execute python code in thread

[Weirui Kuang]

The current implementation of exec_python_code is a multi-processing version, which should be in if __name__ == "__main__". We can implement it in the thread and mark it as TODO now.

Update about global var:

# Create a new global namespace dictionary
 global_namespace = {}

 # Copy the contents of the current global namespace into the new namespace dictionary
 global_namespace.update(globals())

 # Execute the provided code within the newly defined global context
 exec(code, global_namespace)