Hi folks,
I'm new to pyglet. I'm looking for a Python GUI that I can use to teach
game programming to students. It's 2013. I've already gotten my students
working with Python 3. I refuse to complicate their education with Python
2. Supposedly, pyglet 1.2 alpha 1 will work on Python 3, automatically
running 2to3 on the core package code (if not the examples) when you
install it using Python3. It apparently did so, silently. Still, I have
had trouble getting everything to work.
I'm starting with my Ubuntu Linux 13.04 system. I'll repeat the process on
my Windows virtual machine, once I have understood and solved the problems
I'm having.
Here's what I've done successfully: I downloaded and unzipped
pyglet1.2alpha1.tar.gz. From the pyglet1.2alpha1 directory, I executed
"sudo python3 setup.py install". I changed back out of the pyglet1.2alpha1
directory, to avoid importing the local package. Then I executed
"python3", and from the interpreter, I executed "import pyglet". No error
message was received. I exited the interpreter.
Next, I tried running some of the example code that is found in the
package. All the code in the directory
pyglet1.2alpha1/examples/programming_guide
runs fine, except for events.py and animation.py. I could see that the
problem with events.py was the presence of Python2 print statements. I was
able to make it work by applying 2to3. In contrast, here is the traceback
from animation.py:
===================================
Traceback (most recent call last):
File "/usr/local/lib/python3.3/dist-packages/pyglet/resource.py", line
538, in animation
identity = self._cached_animations[name]
File "/usr/lib/python3.3/weakref.py", line 69, in __getitem__
o = self.data[key]()
KeyError: 'dinosaur.gif'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "animation.py", line 62, in <module>
animation = pyglet.resource.animation('dinosaur.gif')
File "/usr/local/lib/python3.3/dist-packages/pyglet/resource.py", line
540, in animation
animation = pyglet.image.load_animation(name, self.file(name))
File "/usr/local/lib/python3.3/dist-packages/pyglet/image/__init__.py",
line 2425, in load_animation
raise first_exception
File "/usr/local/lib/python3.3/dist-packages/pyglet/image/__init__.py",
line 2417, in load_animation
image = decoder.decode_animation(file, filename)
File
"/usr/local/lib/python3.3/dist-packages/pyglet/image/codecs/gdkpixbuf2.py",
line 121, in decode_animation
gif_stream = gif.read(file)
File "/usr/local/lib/python3.3/dist-packages/pyglet/image/codecs/gif.py",
line 85, in read
raise ImageDecodeException('Not a GIF stream')
pyglet.image.codecs.ImageDecodeException: Not a GIF stream
===================================
The KeyError did not look like a Python2/3 compatibility problem. Still,
I tried running 2to3 on animation.py. 2to3 reported back "RefactoringTool:
No files need to be modified." I'm stuck on this one.
Finally, I could not run pyglet1.2alpha1/tests/test/py. This was, at least
partially, a 2to3 problem:
===================================
File "test.py", line 274
print '-' * 78
^
SyntaxError: invalid syntax
===================================
But when I fixed the offending print statement with 2to3, I got another
error, from inside pyglet itself:
===================================
Traceback (most recent call last):
File "test.py", line 215, in <module>
import tests.regression
File "../tests/regression/__init__.py", line 11, in <module>
from pyglet.image import get_buffer_manager
File "../pyglet/__init__.py", line 276
print '[%d] %s%s %s' % (thread, indent, name, location)
^
SyntaxError: invalid syntax
===================================
That error message suggests that 2to3 did not, in fact, correct every
Python2 print statement that it encountered when building and installing
pyglet. That worries me. What else might 2to3 have failed to correct?
I'm not complaining, I realize that things like this are very difficult to
automate. But if anyone has any advice to solve the two problems I'm
seeing, I would appreciate it. I want to give pyglet a thorough workout
before offering it to my students. I would hate to see them try to use it,
run into problems that have to do with the package and not their own code,
and give up. Thanks.
--
You received this message because you are subscribed to the Google Groups
"pyglet-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/pyglet-users.
For more options, visit https://groups.google.com/groups/opt_out.
