[docs] [issue10225] Fix doctest runable examples in python manual

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


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nosy: +andymaier, belopolsky, docs at python, eric.araujo, ezio.melotti, georg.brandl, lukasz.langa, rhettinger, terry.reedy -lissacoffeyx

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10225>
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