[issue24860] handling of IDLE 'open module' errors

[Terry J. Reedy]

Terry J. Reedy added the comment:

I see this as two related changes:

a) Leave the module name query box open when there is a error, so the user can either correct a mistake (or hit Cancel) without reopening the box and re-entering the module name.  Good idea.

b) Put the error message in the box itself, perhaps with a beep.  I presume there would be no [OK] button, but rather the cursor would remain in the entry box.  Nice simplification.

I believe 'not a source-based module' means 'not a python-coded module', which seems a little clearer. We could check the importlib doc.

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stage:  -> needs patch

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<http://bugs.python.org/issue24860>
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