Newb Issue: Realtime output

I'm trying to create a fullscreen CLI for some scripts. I have a fullscreen application that is an input text field and two output text fields.

The first output text field is a "control" output window, for stuff like information regarding which scripts are running, their progress, etc..

The second output text field is a true "output" text field which returns the results from the script.

My issue is that I want to be able to make realtime changes to the "control" output window, to give the user feedback on what step the is being done to launch the script.

Basically it looks like this at the moment...

def do_command(args):
  print_to_control("Preping for command")
  #prep for command
  print_to_control("Executing command")
  output = subprocess.output_check(cmd)
  print_to_output(ouput)
  return

def print_to control(string):
 new_text = control_window.text + string
 control_window.document = Document(text=new_text)
 return

Whenever it runs, it completes the subprocess before updating the command window. What I want is for those prints to occur immediately whenever it occurs in the code.

I've just started using python prompt toolkit so maybe there is an easy way to solve it, but any assistance on this would be great

No repository file or test is named. Start by reviewing the prompt-toolkit application and event-loop entry points, then trace do_command, print_to_control, and the blocking subprocess.output_check call. The issue does not define a specific implementation or testable completion condition.