[open] Esay way off adding file pool items as variables?

Comments

• sebastiaan

  January 2015 edited 3:12AM

  Hi,

  The folder that contains the file pool is available as exp.pool_folder, so you can get a list of all files in the pool like this (randomly shuffled):

  # Retrieve all files in the pool folder as a list
  import os
  import random
  fname_list = os.listdir(exp.pool_folder)
  # Randomly shuffle the list
  random.shuffle(fname_list)
  

  Then, at the beginning of each trial, you could get one item from this list and use it as an experimental variable, like so (in the prepare phase of an inline_script):

  # Pop the last file name from the list and set it as experimental variable
  # `fname`
  exp.set('fname', fname_list.pop())
  

  Does that help at all?

  Cheers,
  Sebastiaan

  
  
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• Erelium

  January 2015 edited 3:12AM

  Well, I am not the best at coding within Open Sesame (I only followed an introductory course)
  I do however, get what the script is trying to do. My question is just: Where in the experiment do I place the first part of the script (where it retrieves a file list)? if I place it in an in-line script before the loop sequence (the actual experiment) starts, it says fname_list stays undefined When it tries to run the prepare phase of the second script.

  If this takes too much time to properly explain, i will just do it by hand. It would take it bit longer, but at least I know how that works

  Thanks for the help anyway!
• sebastiaan

  January 2015 edited 3:12AM

  Just at the very begging of the experiment in the prepare phase of an inline_script item should do the trick!

  
  
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