Perform part of script if experiment quits (Escape button)

Comments

• fladd

  November 2020

  Yes! As described here: https://docs.expyriment.org/expyriment.control.html#expyriment.control.end

  You have two options:

  1. you set the parameter system_exit to False which will then make sure you code after the end() method is evaluated
  2. you put your code into a function and set the parameter pre_quit_function to this function

  
  

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• JJJ

  December 2020

  Thanks for your quick reply.

  Even though I've tried both ways they do not work. It only works if the experiment ends normally. If the Esc button is pressed meanwhile, this block of code is not performed. Below are the examples of what I've tried

  

  

  
  
• fladd

  December 2020

  Sorry I misunderstood before.

  
  

  What you want to achieve is possible in two ways.

  
  

  1. Within Expyriment, by manually defining how to process control keys (e.g. ESC) in all wait functions you use:

  
  

  ```

  def custom_process_control_keys():

     expyriment.io.Keyboard.process_control_keys(quit_confirmed_function=convert_variables)

  
  

  # and then calling this explicitely as callback function in EVERY wait method in your code, e.g.:

  exp.keyboard.wait(callback_function=custom_process_control_keys, process_control_events=False)

  ```

  
  

  2. Independent of Expyriment, by registering an atexit function:

  
  

  ```

  import atexit

  atexit.register(convert_variables)

  ```

  
  

  Hope that helps!

  Warning There was an error rendering this rich post.
• fladd

  December 2020 edited December 2020

  I am sorry, I don't know how to format code in here.

  
  

  Here is the same answer correctly formatted:

  
  

  https://gist.github.com/fladd/6e0c0af517b961c75c721b57fc66fab1

  Warning There was an error rendering this rich post.
• JJJ

  December 2020

  Great, that works! Thank you!