[solved] How to use items in a list as variables

Comments

• sebastiaan

  September 2014 edited 3:12AM

  Hi,

  So, if I understand correctly, you basically want to read in a list of words, shuffle it, and present the words one by one. That's it, right?

  You've already got the first step covered: Loading and shuffling the list. You should do this in the prepare phase of an inline_script that is executed before you start looping through the list.

  import numpy as np
  # Load the list from a file named `words.txt` that is placed in the file pool.
  # Change the source file as necessary. (But maybe don't place it in the
  # python site-packages folder!)
  word_list = np.loadtxt(exp.get_file('words.txt'), dtype=str)
  # Shuffle
  np.random.shuffle(word_list)
  # Start at word 1 (i.e. index 0)
  word_nr = 0
  

  Next, in the prepare phase of an inline_script at the start of a trial sequence, you simply retrieve the word at index word_nr, set it as an experimental variable, and increase the word_nr counter.

  # Retrieve the word at position `word_nr`
  word = word_list[word_nr]
  # Set it as an experimental variable
  exp.set('word', word)
  # Increase the word counter
  word_nr += 1
  

  That's it, basically. Now you can use [word] in sketchpads etc.

  Cheers!
  Sebastiaan

  
  
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• kerb27

  September 2014 edited 3:12AM

  I cannot thank you enough! I appreciate this tremendously.

  Take care!
• kerb27

  September 2014 edited 3:12AM

  I was able to load the words and present them on a screen successfully! I do have one more question: How can I store those presented words in the first loop as a variable I can re-present in a second loop? For instance, if you studied cat, dog and mouse in the first phase, I would need to represent cat dog and mouse along with rabbit, bird, and fox in the second phase. With the above code it seems I redraw from the original pool of random words when I need the already studied words to reappear for testing later. I need to access them specifically so I can show them again. Any thoughts?
• Edwin

  September 2014 edited 3:12AM

  The words will still be stored in the same list, so you can simply redraw them from that list. The list was only shuffled once, so their order will still be the same the second time around.

  Good luck!
• kerb27

  September 2014 edited 3:12AM

  When I refer to the list in the second loop, it says that it is undefined
• kerb27

  September 2014 edited 3:12AM

  I attempted to make the word_list global, but still it does not seem to recognize the python variable later on. Is there anyway to save the presented words to a new text file?
• sebastiaan

  September 2014 edited 3:12AM

  Is there anyway to save the presented words to a new text file?

  Closed, as a new discussion has been opened for this question (#1123).

  
  
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