[Tutor] Does Python have any callback function?

[Wong Vincent]

Dear tutor,
     My current application has 2 python scripts running in parallel, say script A and B. 
  script A: GUI
  script B: data processing.
   
  A will invoke B to run. If I would like B to update processing status to A(so that user is able to see realtime status), how can I do it?
   
  Appreciate your guidance...
   
  Best regards
  Vincent

 
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