labcomputer/joystick.html 2017-04-21

labcomputer, psychopy, joystick problem

using the labcomputer with a joystick in Psychopy

problem 1

if using the code as given at the psychopy website gives this error:

Traceback (most recent call last):
  File "E:\wilberth\joystick.py", line 15, in 
    from psychopy.hardware import joystick
  File "C:\Python27\lib\site-packages\psychopy\hardware\joystick\__init__.py", line 36, in 
    import pyglet_input
  File "C:\Python27\lib\site-packages\psychopy\hardware\joystick\pyglet_input\__init__.py", line 163, in 
    from directinput import get_devices, get_joysticks
  File "C:\Python27\lib\site-packages\psychopy\hardware\joystick\pyglet_input\directinput.py", line 6, in 
    import app
  File "C:\Python27\lib\site-packages\psychopy\hardware\joystick\pyglet_input\app\__init__.py", line 150, in 
    from win32 import Win32EventLoop as PlatformEventLoop
  File "C:\Python27\lib\site-packages\psychopy\hardware\joystick\pyglet_input\app\win32.py", line 44, in 
    from pyglet.libs.win32 import _kernel32, _user32, types, constants
ImportError: No module named libs.win32

Psychopy coder solution

download the newest version of pyglet.zip from https://pypi.python.org/pypi/pyglet#downloads
unzip it somewhere
make a new directory C:\Python27\Lib\site-packages-local
from the archive copy the subdirectories 'pyglet' and 'pyglet.egg-info' to C:\Python27\Lib\site-packages-local

in your python code use for the initialization:

import sys
sys.path.insert(0, "C:\\Python27\\Lib\\site-packages-local")

# import psychopy libraries
from psychopy.hardware import joystick

joy = joystick.Joystick(0)

and where reading joystick input:

joy.getX()

Psychopy builder solution (also works for coder)

in psychopy builder this solution is won't do, since you cannot insert code before importing psychopy libraries. There the solution is:

download the newest version of pyglet.zip from https://pypi.python.org/pypi/pyglet#downloads
unzip it somewhere
from the archive copy the subdirectories 'pyglet' the location of your experiment file (.psyexp)
in your python code use for the initialization:
```
from psychopy.hardware import joystick
joy = joystick.Joystick(0)
```
and where reading joystick input:
```
joy.getX()
```

Problem 2

If you get the error message:

Traceback (most recent call last):
  File "E:\joystick_universal.py", line 85, in 
    win.flip()  # redraw the buffer
  File "C:\Python27\lib\site-packages\psychopy\visual\window.py", line 610, in flip
    dispatcher.dispatch_events()
AttributeError: 'DirectInputDevice' object has no attribute 'dispatch_events'

as shown in https://groups.google.com/forum/#!topic/psychopy-users/CO37d-PMQ9k you can fix it by changing the file window.py line 610:

<- dispatcher.dispatch_events()
-> dispatcher._dispatch_events()

Alternative, you you can alter your script:

# after joy = joystick.Joystick(0) has been called, assuming your window is called 'win':
for d in win._eventDispatchers:
    d.dispatch_events = d._dispatch_events

Wilbert's website at SocSci

> Computer> Labcomputer> Joystick

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labcomputer, psychopy, joystick problem

problem 1

Psychopy coder solution

Psychopy builder solution (also works for coder)

Problem 2