"pyglet.gl.ContextException: Could not create GL context" when cocos imported in main process

[buxx]

There is pyglet bug if we import cocos outside "real" process:

This is not working:

from multiprocessing import Process
import cocos

class HelloWorld(cocos.layer.Layer):
    def __init__(self):
        super().__init__()

        label = cocos.text.Label(
            'Hello, world',
            font_name='Times New Roman',
            font_size=32,
            anchor_x='center', anchor_y='center'
        )
        label.position = 320, 240
        self.add(label)


def test_cocos():
    cocos.director.director.init()
    hello_layer = HelloWorld()
    main_scene = cocos.scene.Scene(hello_layer)
    cocos.director.director.run(main_scene)


p = Process(
    target=test_cocos
)
p.start()
p.join()

And produce

Process Process-1:
Traceback (most recent call last):
File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
self.run()
File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "c.py", line 21, in test_cocos
cocos.director.director.init()
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/cocos/director.py", line 327, in init
self.window = window.Window(*args, **kwargs)
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/pyglet/window/xlib/init.py", line 163, in init
super(XlibWindow, self).init(*args, **kwargs)
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/pyglet/window/init.py", line 515, in init
context = config.create_context(gl.current_context)
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/pyglet/gl/xlib.py", line 186, in create_context
return XlibContextARB(self, share)
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/pyglet/gl/xlib.py", line 296, in init
super(XlibContext13, self).init(config, share)
File "/home/bux/Projets/synergine2/venv3.5/lib/python3.5/site-packages/pyglet/gl/xlib.py", line 199, in init
raise gl.ContextException('Could not create GL context')

pyglet.gl.ContextException: Could not create GL context

But this don't procduce errors:

from multiprocessing import Process

def test_cocos():
    import cocos

    class HelloWorld(cocos.layer.Layer):
        def __init__(self):
            super().__init__()

            label = cocos.text.Label(
                'Hello, world',
                font_name='Times New Roman',
                font_size=32,
                anchor_x='center', anchor_y='center'
            )
            label.position = 320, 240
            self.add(label)

    cocos.director.director.init()
    hello_layer = HelloWorld()
    main_scene = cocos.scene.Scene(hello_layer)
    cocos.director.director.run(main_scene)


p = Process(
    target=test_cocos
)
p.start()
p.join()

Maybe it can be fixed (really initialize pyglet when used) ? Or speak about in doc (if it's not already done ... :s)

[ccanepa]

Added to the docs

[crizCraig]

Same problem and same fix with pyglet in general:

from multiprocessing import Process
import time

def test_window():
    import pyglet   #  Must import pyglet here in the process with your window initialization!
    window = pyglet.window.Window()
    time.sleep(5)


if __name__ == '__main__':
    p = Process(target=test_window)
    p.start()