[issue22955] Pickling of methodcaller, attrgetter, and itemgetter

[Josh Rosenberg]

Josh Rosenberg added the comment:

I've made a patch that I believe should cover all three cases, including tests.

In addition to the pickling behavior, I've made two other changes:

1. methodcaller verifies during construction that the name is a string (PyUnicode), and interns it; attrgetter did this already, and I tweaked methodcaller to match for correctness and performance reasons
2. I added proper repr functionality to all three objects. Partially this is just to make it look nicer, but it was also a decent way to spot verify that the pickle/unpickle sequence behaved correctly

Anyone care to review?

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keywords: +patch
nosy: +josh.r
versions: +Python 3.4
Added file: http://bugs.python.org/file37313/pickle_getter_and_caller.patch

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