On 11/24/14 2:25 AM, Patrick Stinson wrote:
Basically, I have an app and am making it possible for the users to
automate it by writing python scripts that run against the app's API. It
includes PyQt5 widgets, a QScintilla editor, and a simple API for I/O.
Apple’s app store is the plan.
Right now I create a new module with types.ModuleType(‘something’), then
exec the code in the module’s dict. Then when the user saves the script
again in my editor, it deletes all top-level references in the module’s
dict that don’t belong to the core list: ['__spec__', '__name__',
'__loader__', '__package__', '__doc__', '__builtins__’] before running
exec again.
So far this seems to effectively “delete” the old module and re-compile
it with the updated source. For example I can create Qt Widgets on the
module level and they are safely deleted when the script is saved.
(BTW: the convention in most groups like this one is to bottom-post: put
your responses beneath the text you are responding to.)
Keep in mind that Python object have a reference to their class. If your
users are defining classes in their modules, and you instantiate the
class to create objects, then even when you reload updated code, the old
objects will still refer to the old classes. This is one of the things
that makes reloading modules in Python so difficult.
On Nov 23, 2014, at 5:56 PM, Ned Batchelder <n...@nedbatchelder.com
<mailto:n...@nedbatchelder.com>> wrote:
On 11/23/14 1:49 AM, Patrick Stinson wrote:
If I create a module with imp.new_module(name), how can I unload it
so that all the references contained in it are set to zero and the
module is deleted? deleting the reference that is returned doesn’t
seem to do the job, and it’s not in sys.modules, so where is the
dangling reference?
Thanks!
This sounds tricky, and possible very difficult to do properly. Do
you mind if I ask what the larger problem is? Python might not be
very good at having modules come and go as you want.
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Ned Batchelder, http://nedbatchelder.com
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Ned Batchelder, http://nedbatchelder.com
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https://mail.python.org/mailman/listinfo/python-list
