[Pythonmac-SIG] appscript CommandError timeout - always before 2**16 transactions, sometimes well before

[Gary Poster]

Hey Ken. :-)

It hung for me.

Gary

got a CommandError at count 57474
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 21, in first_timeout
  File "build/bdist.macosx-10.6-universal/egg/appscript/reference.py", line 504, in __call__
appscript.reference.CommandError: Command failed:
		OSERROR: -1712
		MESSAGE: Apple event timed out.
		COMMAND: app(u'/Applications/iTunes.app').tracks[1].name.get()


On Nov 18, 2009, at 2:54 PM, ken manheimer wrote:

> def first_timeout():
>     """Gratuitous itunes appscript reference cycle to elicit a timeout.
> 
>     It usually happens on some systems after just about 2**16 (= 2**2**2**2)
>     interactions, and sometimes substantially before that."""
>     import appscript
>     import sys
>     itunes = appscript.app('itunes')
>     t = itunes.tracks[1]
>     count = 0
>     class PassedLimit(Exception): pass
>     try:
>         while True:
>             count += 1
>             if count % 1000 == 0:
>                 sys.stderr.write("%i\n" % count)
>             if count > 65530:
>                 sys.stderr.write("%i\n" % count)
>             elif count > 66000:
>                 raise PassedLimit
>             x = t.name.get()
>     except appscript.reference.CommandError:
>         sys.stderr.write("got a CommandError at count %i\n" % count)
>         raise
>     except PassedLimit:
>         sys.stderr.write("exceeded threshold without triggering the timeout\n")