[issue9421] configparser.ConfigParser's getint, getboolean and getfloat don't accept `vars`

[Łukasz Langa]

Łukasz Langa <lukasz at langa.pl> added the comment:

Actually the square bracket form is how `range()` is documented so there is some limited precedent in that regard.

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<http://bugs.python.org/issue9421>
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