Pulling up a different canvas depending on the variable

Comments

• tnells

  October 2016

  from openexp.canvas import canvas
  from openexp.keyboard import keyboard
  
  #settings
  timeout1  = var.tar_present_time #target presentation duration
  timeout2  = var.keyboard2_time #fixation canvas duration
  
  timeout = timeout1 + timeout2
  ready_for_break = False
  #create keyboard
  my_keyboard = keyboard(exp,keylist=['l','k'])
  
  # initialize important variables
  var.response_time = 0
  var.correct = 0
  var.resp = None
  
  #choose stimulus for target
  my_target_canvas = canvas(exp)
  var.target_sketchpad = str.show ("target_var.target_pic")
  if var.target_sketchpad == str.show ("target_var.target_pic"):
      my_target_canvas = ("target_var.target_pic")
  
  #create while loop for what should show when target is present for target present trials
  if var.Tar_present == 'yes':
      t0 = my_target_canvas.show()
      while clock.time()-t0 < timeout:
          if clock.time()-t0 > timeout1: 
              my_fix_canvas.show()
          if not ready_for_break:
              var.resp, time = my_keyboard.get_key(timeout=10) # a very small value is enough
              var.response = var.resp
              if var.resp != None:
                  ready_for_break = True
                  if var.resp == var.Correct_resp:
                      var.correct = 1
                  else:
                      var.correct=0
                  var.response_time = time-t0
              if var.resp == None:
                  var.response_time = time - t0
  
  #create while loop for same duration but only fixation screen for catch trials              
  if var.Tar_present == 'no':
      t0 = my_fix_canvas.show()
      while clock.time()-t0 < timeout:
          if not ready_for_break:
              var.resp, time = my_keyboard.get_key(timeout=10) # a very small value is enough
              var.response = var.resp
              if var.resp != None:
                  ready_for_break = True
                  var.response_time = time-t0
              if var.resp == None:
                  var.correct = 1
              else:
                  var.correct = 0
  
  # Maintain feedback variables. This ensures that
  # you can use the feedback item as usual
  var.total_responses = (var.total_responses + 1)
  if var.correct:
      var.total_correct = (var.correct +1)
  var.total_response_time = (var.total_response_time + var.response_time)
  var.acc = 100. * var.total_correct / var.total_responses
  var.avg_rt = var.total_response_time / var.total_responses
  var.accuracy =var.acc
  var.average_response_time =var.avg_rt
  
• tnells

  October 2016

  Traceback:
    File "C:\Program Files\OpenSesame\lib\site-packages\libopensesame\inline_script.py", line 102, in run
      self.experiment.python_workspace._exec(self.crun)
    File "C:\Program Files\OpenSesame\lib\site-packages\libopensesame\python_workspace.py", line 161, in _exec
      exec(bytecode, self._globals)
    File "<string>", line 21, in <module>
  AttributeError: type object 'str' has no attribute 'show'
  
• sebastiaan

  October 2016

  Hi,

  A line like this:

  var.target_sketchpad = str.show ("target_var.target_pic")
  

  … in an otherwise reasonable script, suggests that you're trying to modify a script that you got from someone else, but that you don't actually know any Python. Am I correct?

  If so, then it's probably best to start by taking a step back, and first learning some basic Python:

  • http://osdoc.cogsci.nl/3.1/manual/python/about/#learning-python

  This won't take long--you don't need more than the basics. But then we have some common ground to talk about what you actually want to do here, and why it doesn't work. If we try this now, I think we'll just miscommunicate. What do you say?

  Cheers,
  Sebastiaan

  
  
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