Issue 473 in pyglet: AttributeError: 'NoneType' object has no attribute 'startswith'

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Status: New
Owner: ----

New issue 473 by stodge: AttributeError: 'NoneType' object has no
attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

What steps will reproduce the problem?
1. Tried to run any of the graphical examples:
2. Example applications crash

Paste in the traceback or error message:

./multiple_windows.py
Traceback (most recent call last):
File "./multiple_windows.py", line 40, in <module>
from pyglet.gl import *
File "/usr/lib/python2.6/site-packages/pyglet/gl/__init__.py", line 510,
in <module>
import pyglet.window
File "/usr/lib/python2.6/site-packages/pyglet/window/__init__.py", line
1684, in <module>
gl._create_shadow_window()
File "/usr/lib/python2.6/site-packages/pyglet/gl/__init__.py", line 494,
in _create_shadow_window
_shadow_window = Window(width=1, height=1, visible=False)
File "/usr/lib/python2.6/site-packages/pyglet/window/xlib/__init__.py",
line 474, in __init__
super(XlibWindow, self).__init__(*args, **kwargs)
File "/usr/lib/python2.6/site-packages/pyglet/window/__init__.py", line
686, in __init__
self._create()
File "/usr/lib/python2.6/site-packages/pyglet/window/xlib/__init__.py",
line 683, in _create
self.switch_to()
File "/usr/lib/python2.6/site-packages/pyglet/window/xlib/__init__.py",
line 781, in switch_to
self._context.set_current()
File "/usr/lib/python2.6/site-packages/pyglet/gl/__init__.py", line 347,
in set_current
setattr(self, attr, check(self._info))
File "/usr/lib/python2.6/site-packages/pyglet/gl/__init__.py", line 314,
in <lambda>
lambda info: info.get_renderer().startswith('ATI Radeon X')),
AttributeError: 'NoneType' object has no attribute 'startswith'

pyglet 1.1 with Python 2.5: Paste in the output of `python -m pyglet.info`
Other: Paste in the output of tools/gl_info.py (included in source distro):

See attachment for output of pyglet.info.

Any additional info (platform/language/hardware) that may be relevant?

Fedora 12 running on a Dell M4300 laptop.

gl_info.py crashes.

Attachments:
pyglet_info.txt 6.0 KB

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Updates:
Status: Accepted
Labels: OpSys-Linux Type-Defect

Comment #1 on issue 473 by chardster: AttributeError: 'NoneType' object has

no attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

This generally happens because the Context.set_current is called before the
real
(platform specific) context has been initialised. Poking through the code I
can only
presume that we end up with an instance of BaseXlibContext instead of any
of its
subclasses.

stodge: Could you confirm the types of w1.context and w2.context from the
multiple_windows.py example for your setup? Take a copy of the file and
add 'print
type(w1.context), type(w2.context)' before 'pyglet.app.run()'

[codesite...@google.com]

Comment #2 on issue 473 by stodge: AttributeError: 'NoneType' object has no
attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

Tried that but it doesn't help. The crash occurs "inside" the import:

from pyglet.gl import *

So my print statements are never reached.

[codesite...@google.com]

Comment #3 on issue 473 by stodge: AttributeError: 'NoneType' object has no
attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

Anything else I can report/find for you? Cheers

[codesite...@google.com]

Comment #4 on issue 473 by lexa.knyazev: AttributeError: 'NoneType' object

has no attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

I got the same on Fedora 12 with NVIDIA card and nouveau driver (for now it
lacks 3D
support).
Try proprietary driver.

[codesite...@google.com]

Comment #5 on issue 473 by stodge: AttributeError: 'NoneType' object has no
attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

Sorry - forgot to mention that this was the proprietary NVIDIA driver.

[codesite...@google.com]

Comment #6 on issue 473 by lexa.knyazev: AttributeError: 'NoneType' object

has no attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

what is output of:

$ glxinfo | egrep "vendor|OpenGL"

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Comment #7 on issue 473 by stodge: AttributeError: 'NoneType' object has no
attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

Ah:

glxinfo | egrep "vendor|OpenGL"
Error: glXCreateContext failed

[codesite...@google.com]

Comment #8 on issue 473 by opbstudios: AttributeError: 'NoneType' object

has no attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

i am also having this issue, python 2.6.5, svn trunk of pyglet, nvidia
proprietary
driver.

here's my crash
Python 2.6.5 (r265:79063, Mar 18 2010, 23:38:15)
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyglet
>>> window = pyglet.window.Window()

Traceback (most recent call last):

File "<stdin>", line 1, in <module>
File "pyglet/__init__.py", line 313, in __getattr__
__import__(import_name)
File "pyglet/window/__init__.py", line 1810, in <module>
gl._create_shadow_window()
File "pyglet/gl/__init__.py", line 208, in _create_shadow_window

_shadow_window = Window(width=1, height=1, visible=False)

File "pyglet/window/xlib/__init__.py", line 158, in __init__
super(XlibWindow, self).__init__(*args, **kwargs)
File "pyglet/window/__init__.py", line 558, in __init__
self._create()
File "pyglet/window/xlib/__init__.py", line 248, in _create
self.context.attach(self.canvas)
File "pyglet/gl/xlib.py", line 267, in attach
self.set_current()
File "pyglet/gl/xlib.py", line 272, in set_current
super(XlibContext10, self).set_current()
File "pyglet/gl/base.py", line 308, in set_current
setattr(self, attr, check(self._info))
File "pyglet/gl/base.py", line 256, in <lambda>
lambda info: (info.get_renderer().startswith('ATI Radeon X')

AttributeError: 'NoneType' object has no attribute 'startswith'

hope that helps

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Comment #9 on issue 473 by opbstudios: AttributeError: 'NoneType' object

has no attribute 'startswith'
http://code.google.com/p/pyglet/issues/detail?id=473

re-entering this attach my pyglet.info dump

Attachments:
pyglet.inf 2.4 KB