[issue19512] Avoid temporary Unicode strings, use identifiers to only create the string once

[STINNER Victor]

STINNER Victor added the comment:

@Georg, Serhiy, Martin: Sorry for having commits directly without more review. I didn't expect negative feedback on such changes, I thaught to moving from literal C byte string to Python identifiers was a well accepted practice since identifiers are used in a lot of places in Python code base.

So what should I do now? Should I revert all changesets related to this issue, or can we keep these new identifiers and close the issue?

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nosy: +loewis

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<http://bugs.python.org/issue19512>
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