Error Psycho' object has no attribute 'set_font' when connecting to Eyelink

Bangele

Hi, we've been using Opensesame (on Ubuntu 22.04) to collect data with an Eyelink Duo without any issues for a while now, but since updating packages we are now getting this error whenever we are starting an eye tracking experiment and trying to calibrate the Eyelink:

Traceback (most recent call last):
  File "/home/cinc/.local/lib/python3.10/site-packages/libqtopensesame/misc/process.py", line 134, in run
    exp.run()
  File "/home/cinc/.local/lib/python3.10/site-packages/libopensesame/experiment.py", line 351, in run
    self.items.execute(self.var.start)
  File "/home/cinc/.local/lib/python3.10/site-packages/libopensesame/item_store.py", line 89, in execute
    self.run(name)
  File "/home/cinc/.local/lib/python3.10/site-packages/libopensesame/item_store.py", line 105, in run
    self[name].run()
  File "/home/cinc/.local/lib/python3.10/site-packages/libopensesame/sequence.py", line 48, in run
    self.experiment.items.run(_item)
  File "/home/cinc/.local/lib/python3.10/site-packages/libopensesame/item_store.py", line 105, in run
    self[name].run()
  File "/usr/lib/python3/dist-packages/opensesame_plugins/pygaze/pygaze_init/pygaze_init.py", line 179, in run
    self.experiment.pygaze_eyetracker = EyeTracker(
  File "/home/cinc/.local/lib/python3.10/site-packages/pygaze/eyetracker.py", line 71, in __init__
    self.__class__.__init__(self, display, **args)
  File "/home/cinc/.local/lib/python3.10/site-packages/pygaze/_eyetracker/libeyelink.py", line 177, in __init__
    self.eyelink_graphics = EyelinkGraphics(self, _eyelink)
  File "/home/cinc/.local/lib/python3.10/site-packages/pygaze/_eyetracker/eyelinkgraphics.py", line 95, in __init__
    self.draw_menu_screen()
  File "/home/cinc/.local/lib/python3.10/site-packages/pygaze/_eyetracker/eyelinkgraphics.py", line 145, in draw_menu_screen
    self.menuscreen.draw_text(text="Eyelink calibration menu",
  File "/home/cinc/.local/lib/python3.10/site-packages/pygaze/_screen/osscreen.py", line 250, in draw_text
    self.canvas.set_font(style=font, size=fontsize)
AttributeError: 'Psycho' object has no attribute 'set_font'

An equivalent error occurs with the other backends. What could be the issue?

Many thanks!

Bernhard

sebastiaan

Hi @Bangele ,

There was indeed a bug in a specific version of PyGaze. This has been fixed in 0.8.8. which you can install either through the Cogscinl PPA, anaconda, or by getting the latest source here.

Hope this helps!

— Sebastiaan

Bangele

Hi Sebastiaan,

That fixed it! Turns out I had an old version in .local/lib/python3.10/site-packages/pygaze/. After deleting it and installing the new version from the PPA, everything now works.

Thank you so much for the quick reply and the help in figuring this out!

Bernhard