[docs] [issue12920] inspect.getsource only works for objects loaded from files, not interactive session

[Zorceta]

Zorceta added the comment:

When provided object is not from a file, like input in interactive shell, `inspect` internals will check for it in `linecache`, which official Python shell and IDLE won't put interactive shell input into, yet. This can be simply solved.

Whether interactive shell input can be put into `linecache` may be a problem, but it'll make life easier, as interactive shell saves time from edit-save-run 'loop'.

btw, I changed the title, since I don't think, what original author thought need to be documented, is absolutely right.

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title: Document that inspect.getsource only works for objects loaded from files, not interactive session -> inspect.getsource only works for objects loaded from files, not interactive session

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12920>
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