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Fix deactivation of embedded instance. #10207

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merged 1 commit into from Jan 29, 2017
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@Carreau Carreau commented Jan 27, 2017

While deactivation of full instances make some sens, the most common
behavior user expect when creating an instance and using
kill_embedded is deactivation of the current call location.

Implement the expected on by default, add options to get previous
behavior, and add flag for direct exit and no-confirm

Fix #9761

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Carreau commented Jan 29, 2017

@takluyver ? @minrk ?

else:
kill = True
if kill:
self.shell._disable_init_location()
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Haven't you got these back to front? This is the instance branch, but it looks like it's killing by location (and vice versa).

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Also, since you've added a distinction between call location and init location, do we need ways to kill by both? Or is that starting to get too arcane and fiddly?

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Aha, I see - setting shell.embedded_active = False is equivalent to killing by call location, because of the property access. I'd forgotten about that bit.

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yeah, it's a bit weird, killing by instance by setting an attribute on the instance does not really help if instances are created in a loop. So I do keep track of instance location and call location.

Honestly I shouldn't have make the "embedded_active" a property and keep all these details private... but backward compatibility. The worst case I'm trying to cover is :

for loop:
    ipembed = InteractiveShellEmbed()
    if option:
         ipembed()
    elseif:
         ipembed()
    else:
         ipembed()

You can either kill the 3 call locations or kill a single instance location.

I agree that the "instance location" is abit weirdish, but that's the behavior of 5.0 and 5.1, so I leave it as an option.

So I think I got the logic right, and I think we should keep both.

@@ -311,7 +379,8 @@ def embed(**kwargs):
cls.clear_instance()
frame = sys._getframe(1)
shell = InteractiveShellEmbed.instance(_call_location_id='%s:%s' % (frame.f_code.co_filename, frame.f_lineno), **kwargs)
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On this line, I think _call_location_id should be changed to _init_location_id, right?

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indeed.

if self._call_location_id in InteractiveShellEmbed._inactive_locations:
InteractiveShellEmbed._inactive_locations.remove(self._call_location_id)
InteractiveShellEmbed._inactive_locations.remove(
self._call_location_id)
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BTW, sets have a .discard() method which is like .remove() but doesn't raise if the item isn't in the set. So instead of checking if a in b: b.remove(a), we can just do b.discard(a).

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Oh ! Sweet ! Thanks !

While deactivation of full instances make some sens, the most common
behavior user expect when creating an instance and using
``kill_embedded`` is deactivation of the current call location.

Implement the expected on by default, add options to get previous
behavior, and add flag for direct exit and no-confirm

Fix ipython#9761
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Carreau commented Jan 29, 2017

comments should be addressed (except the call-location/init-location thing where I don't think anything is needed)

@takluyver takluyver merged commit 83350fb into ipython:master Jan 29, 2017
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Thanks!

@meeseeksdev backport to 5.x

lumberbot-app bot pushed a commit that referenced this pull request Jan 29, 2017
While deactivation of full instances make some sens, the most common
behavior user expect when creating an instance and using
``kill_embedded`` is deactivation of the current call location.

Implement the expected on by default, add options to get previous
behavior, and add flag for direct exit and no-confirm

Fix  9761
@Carreau Carreau deleted the fix-embedded branch January 29, 2017 22:12
Carreau added a commit that referenced this pull request Jan 29, 2017
@Carreau Carreau added the backported PR that have been backported by MrMeeseeks label Jan 29, 2017
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