Subprocess .wait() is not waiting

Chris Angelico rosuav at
Fri Mar 24 16:09:35 EDT 2017

On Sat, Mar 25, 2017 at 6:55 AM, adam.c.bernier <adam.c.bernier at> wrote:
> On Friday, March 24, 2017 at 12:55:30 PM UTC-7, adam.c.bernier wrote:
>> On Friday, March 24, 2017 at 12:51:02 PM UTC-7, Chris Angelico wrote:
>> > On Sat, Mar 25, 2017 at 6:40 AM, Ian Kelly <ian.g.kelly at> wrote:
>> > > If that's what's happening it would be a bug. Are you sure that the
>> > > other program isn't simply crashing or otherwise failing to complete?
>> > >
>> >
>> > Or possibly is running asynchronously. Is this a GUI app? A lot of
>> > Windows GUI programs don't wait when you invoke them.
>> >
>> > ChrisA
>> Aha! Since the Excel app is a GUI app it's not waiting is that right?
> If that's the case is there any workaround?

Errr.... been a while since I messed with Windows.... from memory, I
think you can "start /wait programname" to make it wait?? Worth a try,
at least.

Otherwise, your best bet would be to wait in a completely different
way. Give the app a specific file name to use as a signal, and when
it's done, it should create that file. You then watch for that file,
and when it exists, you move on.


More information about the Python-list mailing list