Evt.TickCount() not found with Python2.6 on OSX 10.6.3

问题

With Python2.6, the Evt module (from Carbon import Evt) does not have seem to respond to TickCount() on OSX. But Python2.5 is fine:

from Carbon import Evt
s = Evt.TickCount()

On Python2.5 I get a returned integer. On Python2.6 I get:

AttributeError: 'module' object has no attribute 'TickCount'

This is on Snow Leopard. Is there some library that needs to be updated on OSX to allow for TickCount() to work? I'm actually having this problem due to using py2app.

Update for Barry's answer: The problem is that the application that py2app creates, when launched, gives me:

  File "/Users/cybertoast/Projects/scripts/dist/fixcatalystlibs.app/Contents/Resources/__boot__.py", line 40, in mainloop
  [0x0-0x913913].org.pythonmac.unspecified.fixcatalystlibs[11722]       stoptime = Evt.TickCount() + timeout
  [0x0-0x913913].org.pythonmac.unspecified.fixcatalystlibs[11722]   AttributeError: 'module' object has no attribute 'TickCount'

I added VERSIONER_PYTHON_PREFER_32_BIT=yes to my .bash_profile, but the app that py2app creates still has the same problem. The python interpreter, however is happy with the 32-bit fix. But still need a solution to py2app.

回答1:

Since the broken code was only being used for argv emulation, I was able to get my app working by disabling argv emulation. This can be done by setting the 'argv_emulation' key in the py2app OPTIONS hash to False.

Example:

APP = ['MyApp.py']
OPTIONS = { 
   'argv_emulation': False,
   ...
}

setup(
    app=APP,
    options={'py2app': OPTIONS},
    setup_requires=['py2app'],
)

回答2:

The code I have been using requires the use of argv_emulation, so the above solutions have not aided me. In the end, I made use of LSArchitecturePriority in the plist file, setting it to i386. This solved my problem, and allowed me to keep the argv_emulation set to True.

More info can be found here: http://developer.apple.com/library/mac/#documentation/General/Reference/InfoPlistKeyReference/Articles/LaunchServicesKeys.html#/

回答3:

Python runs in 64-bit mode by default in Snow Leopard. It appears that Carbon.Evt hasn't made the transition to full 64-bit compatibility. You can confirm this by trying to run in 32-bit mode (see man python):

oso:~ barry$ export VERSIONER_PYTHON_PREFER_32_BIT=yes
oso:~ barry$ python
Python 2.6.1 (r261:67515, Feb 11 2010, 00:51:29) 
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import Carbon.Evt as evt
>>> evt.TickCount()
2973070
>>>

So, either run py2app in 32-bit mode, or tell us what you're trying to do and perhaps we can provide a 64-bit compatible alternative.

回答4:

Probably the easiest solution is to use another, 32-bit-only Python instead of the Apple-supplied one in 10.6 - for example, install Python 2.6 using the python.org installer. If you want to distribute your app as a standalone app that can be used on multiple OS X versions, you'll need to do that anyway.

来源：https://stackoverflow.com/questions/3461983/evt-tickcount-not-found-with-python2-6-on-osx-10-6-3

标签

python

macos

py2app