[Idle-dev] Fwd: atexit handler in IDLE?

[Roger Serwy]

IDLE implicitly runs a script as if you specified "-i" when using 
regular python from the command line. Perhaps this behavior needs to be 
documented.

For what it's worth, this would make the exitfuncs run on the 3.x series:

diff -r be8e6b81284e Lib/idlelib/run.py
--- a/Lib/idlelib/run.py        Wed Jan 09 19:00:26 2013 +0100
+++ b/Lib/idlelib/run.py        Thu Jan 17 00:41:22 2013 -0600
@@ -381,6 +381,8 @@
              if jit:
                  self.rpchandler.interp.open_remote_stack_viewer()
          else:
+            import atexit
+            atexit._run_exitfuncs()
              flush_stdout()

      def interrupt_the_server(self):



On 01/16/2013 08:47 PM, Steve Spicklemire wrote:
> So how dumb is this? For what it's worth... it works for me.
>
> -steve
>
> aluminum:idlelib steve$ diff -C3  run_orig.py run_new.py
> *** run_orig.py	 2013-01-16 15:31:08.000000000 -0700
> --- run_new.py	 2013-01-16 15:30:47.000000000 -0700
> ***************
> *** 308,313 ****
> --- 308,316 ----
>                if jit:
>                    self.rpchandler.interp.open_remote_stack_viewer()
>            else:
> +             if hasattr(sys,'exitfunc') and sys.exitfunc:
> +                 sys.exitfunc()
> +
>                flush_stdout()
>    
>        def interrupt_the_server(self):
>
>
> On Jan 16, 2013, at 9:17 AM, Roger Serwy wrote:
>
>> Hi Steve,
>>
>> IDLE's subprocess never actually exits, so the atexit handler will not be called. Forcing an exit with sys.exit() will be caught and the subprocess will still not exit.
>>
>> I suggest filing a bug at bugs.python.org.
>>
>> - Roger
>>
>>
>> On 01/16/2013 06:50 AM, Steve Spicklemire wrote:
>>> Hello Idle-dev folks,
>>>
>>> I tried this on the python list, with no luck. ;-(
>>>
>>> I hate to bother you with a basic user question, but I'm not sure where else to go. Is there a better list for this?
>>>
>>> thanks,
>>> -steve
>>>
>>> Begin forwarded message:
>>>
>>>> From: Steve Spicklemire <steve at spvi.com>
>>>> Subject: atexit handler in IDLE?
>>>> Date: January 15, 2013 5:25:34 AM MST
>>>> To: python-list at python.org
>>>> Cc: Steve Spicklemire <steve at spvi.com>
>>>>
>>>> Hello Pythonistas!
>>>>
>>>> I'm trying to get this program, which works on the command line, to run correctly in the IDLE environment:
>>>>
>>>> import atexit
>>>>
>>>> print "This is my program"
>>>>
>>>> def exit_func():
>>>>     print "OK.. that's all folks!"
>>>>
>>>> atexit.register(exit_func)
>>>>
>>>> print "Program is ending..."
>>>>
>>>>
>>>> When I run this on the command line I see:
>>>>
>>>> This is my program
>>>> Program is ending...
>>>> OK.. that's all folks!
>>>>
>>>> When I run this in IDLE I see:
>>>>
>>>> This is my program
>>>> Program is ending...
>>>>
>>>> But the atexit handler is never called. ;-(
>>>>
>>>> I tried to fish through the IDLE source to see how the program is actually called, and I decided it looked like it was being invoked with with os.spawnv, but I'm not sure why this would defeat the atexit handler. Anybody know? I'd like to register such a function in my module, but I need it to work in IDLE so that students can easily use it.
>>>>
>>>> thanks!
>>>> -steve
>>>>
>>>>
>>>>
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