Psychopy: TypeError: unsupported operand type(s) for &: 'long' and 'LP_c_void' when using the pyglet backend

[alpinho]

Under python 2.7 and psychopy 1.90.0 I get the following error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
C:\Users\analuisa\gitrepos\cognitive_protocols\visual_protocols\retinotopy\retinoto.py in <module>()
    275         fixation_callback, pref_color = get_retino_fixation(number)
    276
--> 277         window = visual.Window(fullscr=False)
    278         show_init_screen(
    279             window, u"Chargement... \n", wait_key=None, with_fixation=False)

C:\Users\analuisa\Anaconda2\lib\site-packages\psychopy\visual\window.pyc in __init__(self, size, pos, color, colorSpace, rgb, dkl, lms, fullscr, allowGUI, monitor, bitsMode, winType, units, gamma, blendMode, screen, viewScale, viewPos, viewOri, waitBlanking, allowStencil, multiSample, numSamples, stereo, name, checkTiming, useFBO, useRetina, autoLog, *args, **kwargs)
    373
    374         # setup the context
--> 375         self.backend = backends.getBackend(win=self, *args, **kwargs)
    376         self.winHandle = self.backend.winHandle
    377         global GL

C:\Users\analuisa\Anaconda2\lib\site-packages\psychopy\visual\backends\__init__.pyc in getBackend(win, *args, **kwargs)
     30                              "there is no backend definition to match that "
     31                              "winType.".format(win.winType))
---> 32     return Backend(win, *args, **kwargs)
     33

C:\Users\analuisa\Anaconda2\lib\site-packages\psychopy\visual\backends\pygletbackend.pyc in __init__(self, win, *args, **kwargs)
    221         # store properties of the system
    222         self._driver = pyglet.gl.gl_info.get_renderer()
--> 223         self._origGammaRamp = self.getGammaRamp()
    224         self._rampSize = getGammaRampSize(self.screenID, self.xDisplay)
    225         self._TravisTesting = (os.environ.get('TRAVIS') == 'true')

C:\Users\analuisa\Anaconda2\lib\site-packages\psychopy\visual\backends\pygletbackend.pyc in getGammaRamp(self)
    320
    321     def getGammaRamp(self):
--> 322         return getGammaRamp(self.screenID, self.xDisplay)
    323
    324     @property

C:\Users\analuisa\Anaconda2\lib\site-packages\psychopy\visual\backends\pygletbackend.pyc in screenID(self)
    332                 _screenID = 0xFFFFFFFF & int.from_bytes(scrBytes, byteorder='little')
    333             else:
--> 334                 _screenID = 0xFFFFFFFF & scrBytes
    335         elif sys.platform == 'darwin':
    336             try:

TypeError: unsupported operand type(s) for &: 'long' and 'LP_c_void'

This protocol works fine with psychopy 1.85.3.

[alpinho]

More info: this is under Windows 10 with pyglet 1.3.2.

[peircej]

Thanks for the info. Puzzling because the old code appears to be doing the same but didn't have a type error. I'll do my best to work it out though :-/

Are you sure that this version of pyglet worked with 1.85.3. I'm just wondering whether you might have updated both at the same time (and maybe something changed in pyglet)?

[hsogo]

I'm also having trouble with this issue. My setup is Windows 10 X64, Python 2.7.10 X86, PsychoPy 1.90.0 and Pyglet 1.3.0.

I read source code of pyglet and found that the content of winHandle._dc (=scrBytes) seems to be set in pyglet.window.win32.Win32Window._create(). In this method, return value of _user32.GetDC() is set to _dc. _user32.GetDC() is actually ctypes.windll.user32.GetDC() as defined in pyglet/libs/win32/__init__.py.

Type of the return value of _user32.GetDC() are defined in lines 157 of pyglet/libs/win32/__init__.py as following.

# workaround for win 64-bit, see issue #664
_user32.GetDC.restype = c_void_p # HDC

Changing restype to HDC, PsychoPy can create pyglet window without error.
I think it difficult to fix this issue without editing pyglet codes.

[hsogo]

FYI: replacing pyglet 1.3.0 with 1.2.4 seems to fix this issue in my setup. In addition, pyglet 1.3.0 works fine with Windows10 x64, Python 3.6.1 x64 and the latest PsychoPy.

[alpinho]

At the beginning, when I installed PsychoPy 1.90.0, pyglet was giving me the following error:

NameError: name 'PUINT' is not defined

I have updated afterwards pyglet, according to what it is reported here. I used the following command line:

pip install --upgrade https://bitbucket.org/pyglet/pyglet/get/tip.zip

Then, it gave the error that I reported in the first instance of this thread. Afterwards, I downgraded my PsychoPy version to 1.85.3 and it solved the problem.

[Santihago]

With PsychoPy 1.90.1 / Pyglet 1.4 / Python 2.7 / Windows 7 32 bit I was having the same problem as described by alpinho and hsogo. Downgrading to Pyglet 1.24 solved the issue.

[hoechenberger]

Wasn't this addressed via #1777 and #1787? Could you try again with latest master?

[hsogo]

I tried the latest master with following setups. Both work fine now.

• Windows 10 x64, Python 2.7.10 x86 and Pyglet 1.3.2
• Windows 10 x64, Python 3.6.1 x64 and Pyglet 1.3.0

[hoechenberger]

Great, thanks! So this seems to be resolved.

[hsogo]

Sorry, I noticed that the issue is not fixed in Python 2.7 x86 and Pyglet 1.3.2.
It seems I made a mistake in switching back and forth between Pyglet 1.2.4 and 1.3.2.

[sherdim]

Do not downgrade pyglet - it is nice.

The error fixed with patch to pygletbackend.py : 338

338c338
<                 _screenID = 0xFFFFFFFF & scrBytes
---
>                 _screenID = scrBytes

[peircej]

Thanks @sherdim I didn't know that works. But there are other installations where it's needed, so I'll apply that using a try...except and hopefully everything will be happy!