[issue39759] os.getenv documentation is misleading

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

It is not so uncommon to write:

    foo_rate = float(os.getenv("FOO_RATE", default_foo_rate))

where default_foo_rate is float.

In any case the default value for the default parameter is not a string.

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue39759>
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