[issue37150] Do not allow to pass FileType class object instead of instance in add_argument

[Michele Angrisano]

Michele Angrisano <michele.angrisano at gmail.com> added the comment:

Reading the examples in the doc, it's clear the behavior when FileType takes an argument. What's the behavior of FileType when is called without any argument?

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nosy: +mangrisano

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37150>
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