[Python-Dev] Fix import errors to have data (original) (raw)

Christian Tismer tismer at stackless.com
Tue Aug 3 04:21:14 CEST 2004

Greg Ewing wrote:

Maybe it could be as simple as saving a snapshot of sys.modules whenever importing of a module is begun, and if execution of its body doesn't complete, restoring the snapshot?

This is exactly what I thought of. It seems to be correct, also with nested imports, since this is a stack-like structure of undoable things. What happens in the presence of threads, though?

To my memory, imports in the presense of threads always have been a nightmare. My advice always goues this way: If you must have threads, make sure to import everything through the main thread, before starting new ones.

If you then still have problems, well, I have a different solution, which is also more efficient,... ... but this is another story. Off topic.

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