[solved] 'ascii' codec can't decode byte 0xc3 in position 27: ordinal not in range

Comments

• sebastiaan

  June 2014 edited 3:41AM

  Hi,

  The error message that you see results from a problem in parsing the actual error message. In other words, the actual error message is obscured by a bug in OpenSesame's exception handling system. To see what's going, you try the following code in an inline_script:

  import pygame
  pygame.image.load(exp.get_file(u'my_filename.png'))
  

  ... replace my_filename.png by the name of the problematic file in the file pool. This script should still crash, but hopefully provide a more informative error message.

  Cheers!
  Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!
  
• psychofs

  June 2014 edited 3:41AM

  Hi Sebastiaan,

  Had to change the inline script slightly to match my usage:

  import pygame
  path = "u'%s.png'" % (self.get('ID'))
  pygame.image.load(path)
  

  The Error code now produced by this new inline script is as following:

  Error while executing inline script
  
  phase: run
  item: inline_script
  line: 3
  exception message: Couldn't open u'52.png'
  exception type: error
  
  Traceback:
    File "dist\libopensesame\inline_script.py", line 154, in run
    Inline_script, line 3, in <module>
  error: Couldn't open u'52.png'
  

  An image 52.png exists in the same folder as the experiment. And adding all the pictures to the file pool did not help either.
• Edwin

  June 2014 edited June 2014

  The correct code would actually be:

  import pygame
  path = u'%s.png' % (self.get('ID'))
  pygame.image.load(path)
  

  The u should be before the quotation marks if you use it to denote a unicode string. Currently, your image name is defined as u'52.png' rather than 52.png
• psychofs

  June 2014 edited 3:41AM

  Thanks Edwin for the correction.
  And I just realized it's jpg not png, so I corrected the path accordingly. Could the jpg-format cause the problem?

  Now the error is:

  Error while executing inline script
  
  phase: run
  item: inline_script
  line: 3
  exception message: Couldn't open 52.jpg
  exception type: error
  
  Traceback:
    File "dist\libopensesame\inline_script.py", line 154, in run
    Inline_script, line 3, in <module>
  error: Couldn't open 52.jpg
  

  Still, all pictures are in the same folder as the experiment and all pictures were added to the file pool.

  But don't worry too much, it's not critical anymore. I got used to make my participants switch seats and use my laptop for this part.
• Edwin

  June 2014 edited June 2014

  Hi,

  It seems OpenSesame still can't find the file. One thing that comes to mind, is using the neat way of getting file paths, using the function that @sebastiaan had already mentioned:

  import pygame
  
  # get the file name, e.g. u'52.png'
  filename = u'%s.png' % (self.get('ID'))
  
  # get the full path to the file
  path = exp.get_file(filename)
  
  # load the image, using the full path
  pygame.image.load(path)
  

  This way is preferred, as some systems are not particularly fond of abbreviated paths (i.e.: not using the full path, but just the name of a file in the working directory).

  Good luck!
• psychofs

  July 2014 edited 3:41AM

  Even though the thread was meanwhile marked as solved, I must admit, I just didn't try it anymore on the lab's PCs and just used my laptop. Meanwhile I'm done with this study. So thank you for all the support, Edwin and Sebastiaan! (a short review concerning the mobile part will be given in the runtime environment threat)