[issue29190] Avoid possible errors in comparing strings

[Xiang Zhang]

Xiang Zhang added the comment:

Paste my point here:

I prefer checking the result PyUnicode_Compare to see it's a success or failure.
getrandom doesn't use any lower level unicode operations so it doesn't get a
responsibility to ready the unicode.

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nosy: +xiang.zhang

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29190>
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