Iohub EyeLink fails to import pylink properly

Coding
1

Hello everyone,

I posted another issue here (Iohub EyeLink unresponsive keyboard during calibration), but I wanted to also document what happens if I simply run getting_started.py demo with a clean version of PsychoPy 1.84 on Mac OS 10.9 Mavericks.

Running: /Users/egor/Downloads/distribute/demos/coder/getting_started/getting_started.py

2016-09-06 13:08:41.498 python[91949:507] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to /var/folders/6k/qxj7wz1n5kbff7v1rdlvbkkr0000gv/T/org.psychopy.PsychoPy2.savedState
2016-09-06 13:08:44.569 python[91989:507] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to /var/folders/6k/qxj7wz1n5kbff7v1rdlvbkkr0000gv/T/org.psychopy.PsychoPy2.savedState
Could not add path: /Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/darwin/python27/
<type ‘exceptions.AttributeError’>
AttributeError(“‘module’ object has no attribute ‘EyeLink’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 193, in setConnectionState\n EyeTracker._eyelink=pylink.EyeLink(None)\n’]
** EyeLink Error: Could not connect to EyeLink Eye Tracker. EyeLink Eye tracker device will run in ‘dummy’ mode.
<type ‘exceptions.AttributeError’>
AttributeError(“‘module’ object has no attribute ‘EyeLink’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 193, in setConnectionState\n EyeTracker._eyelink=pylink.EyeLink(None)\n’]
EYELINK Error during _eyelinkSetScreenPhysicalData:
<type ‘exceptions.AttributeError’>
AttributeError(“‘NoneType’ object has no attribute ‘sendCommand’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 1249, in _eyelinkSetScreenPhysicalData\n eyelink.sendCommand(“screen_distance = %d “%(sdist['surface_center'],))\n’]
---- Error during EyeLink EyeTracker Initialization ----
<type ‘exceptions.AttributeError’>
AttributeError(”‘NoneType’ object has no attribute ‘sendCommand’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 85, in init\n self._eyelink.sendCommand(“aux_mouse_simulation = NO”)\n’]
---- Error during EyeLink EyeTracker Initialization ----
Could not add path: /Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/darwin/python27/
Starting Data Collection. Press SPACE key to stop…
<type ‘exceptions.AttributeError’>
AttributeError(“‘module’ object has no attribute ‘EyeLinkCustomDisplay’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 322, in runSetupProcedure\n import eyeLinkCoreGraphicsIOHubPsychopy\n’,
’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyeLinkCoreGraphicsIOHubPsychopy.py”, line 225, in \n class EyeLinkCoreGraphicsIOHubPsychopy(pylink.EyeLinkCustomDisplay):\n’]
<type ‘exceptions.AttributeError’>
AttributeError(“‘NoneType’ object has no attribute ‘isRecording’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 363, in isRecordingEnabled\n return self._eyelink.isRecording() == 0\n’]
<type ‘exceptions.AttributeError’>
AttributeError(“‘NoneType’ object has no attribute ‘startRecording’”,)
[’ File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/eyetracker.py”, line 395, in setRecordingState\n error = self._eyelink.startRecording(1,1,1,1)\n’]

Note that if I add the path to SR version of pylink to PsychoPy standalone paths, it still fails to import properly:

sys.path.append('/Library/Python/2.7/site-packages/pylink/')
print dir(pylink)

################ Running: /Users/egor/Documents/test_pylink.py #################
[‘GSMLink’, ‘LOGGER’, ‘SerialLink’, ‘TCPLink’, ‘UDPLink’, ‘VERSION’, ‘builtins’, ‘doc’, ‘file’, ‘name’, ‘package’, ‘path’, ‘version’, ‘active_logger’, ‘compat’, ‘link’, ‘link_from_url’, ‘logger’]

2

I’m working on getting an Eyelink 1000 system running through psychopy and encountered the same path problem when running a couple of the iohub demos (I don’t have one called getting_started.py). It seems to be trying to import pylink from a specific folder that doesn’t exist. The “import pylink” statement still works, but it imports the wrong pylink library (it’s importing this pylink https://pypi.python.org/pypi/PyLink instead of the SRR one), so the import doesn’t fail but all the following code that is supposed to instantiate an eyelink object fails, hence all the attribute errors.

I tried making a “darwin” folder inside that eyelink folder, and then copying in the pylink library I downloaded from SR Research, but it didn’t fix the problem.

I nosed around in the rest of the packages that come with Psychopy standalone, and it comes with a pylink folder, but it’s the other pylink (https://pypi.python.org/pypi/PyLink), not the SRR pylink. I searched through all the psychopy code and nothing calls pylink besides iohub eyetracker, so I moved that pylink folder (/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/pylink) out of the way and copied in the one I’d downloaded from SRR and now I can get the demos/iohub/eyetracker/selectTracker/run.py to work! I’m not sure why the file-IO pylink is included in Psychopy Standalone.

I’m on a Mac running 10.8.4 using a fresh install of Psychopy Standalone 1.84.

3

Dear Andrea,

I moved that pylink folder
(/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/pylink)
out of the way and copied in the one I’d downloaded from SRR

I should have mentioned that I’ve tried doing that. This actually got my code to work, but demos simply crashed, without giving the same error. So it’s more of a bug report, as the default configuration in iohub does not seem to work.

4

The inclusion of the wrong pylink library was my error when I had to do a complete rebuild of my Python installation (from which the Standalone distributions are built). I erroneously thought when pip install pylink succeeded that SRR had started releasing on PYPI but apparently not. I’m discussing with them doing so to prevent this happening again:
https://www.sr-support.com/showthread.php?5351-pylink-update-on-pypi&highlight=psychopy

I’ll be building a new standalone shortly with the correct pylink libs included

I’m afraid I don’t have any leads on the subsequent crash @egorananyev

1 Like
5

Release 1.84.2 and the standalone includes the correct pylink lib now I believe.

6

Hi

I am experiencing the same issue using the 1.84.2 standalone version on windows 7.

ioHub Server Process Completed With Code:  0
<type 'exceptions.AttributeError'>
AttributeError("'module' object has no attribute 'getEyeLink'",)
['  File "C:\\Program Files (x86)\\PsychoPy2\\lib\\site-packages\\psychopy-1.84.2-py2.7.egg\\psychopy\\iohub\\devices\\eyetracker\\hw\\sr_research\\eyelink\\eyetracker.py", line 1508, in _getCalibrationMessage\n    m=pylink.getEyeLink().getCalibrationMessage()\n']

Are you sure it has been corrected?

7

Did you install the 1.84.2 standalone or did you install the previous standalone and then upgrade it?

8

Hi Andre,

I’m having the same problem on my Ubuntu 17.04 and PsychoPy 1.84.02. i registered at the SRR forum and they have several pylink tar’s (https://www.sr-support.com/forum/downloads/eyelink-display-software/44-pylink?t=14), which one did you exactly use? They have some instructions for system-wide installation of the most recent software (the whole thing, not only pylink), but I want only pylink since I use it in a virtual envrionment. I tried with pylink4python2.7_linux_x64.tar.gz, but when trying to import pylink it complains with “ImportError: libeyelink_core-1.9.so.58: cannot open shared object file: No such file or directory”.

Thanks!

9

Hi Jon,

I went through the post but it seems they are still not providing pylink in PyPi, in your new build are pylink ofr linux included? at psychopy/psychopy/iohub/devices/eyetracker/hw/sr_research/eyelink/ is see only win32 folder, or I am not looking at the correct spot?

Hrvoje

10

I used the pylink for the system I’m on (python 2.7, Mac OSX). I don’t know about pylink on linux, so I don’t know about the error you are getting.