[issue11175] allow argparse FileType to accept encoding and errors arguments

[Lucas Maystre]

Lucas Maystre added the comment:

Here's an attempt at implementing this (my first contribution). Some notes:

- I tried to keep `__repr__()` backwards compatible. It would have been easier to inherit from `_AttributeHolder`, but maybe this might break some things...
- I added some test cases for `__repr__()`, but that's it. I don't think there's any other sensible test to do, as we're really just passing stuff to `open()`
- not sure about the style, especially line breaks...

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keywords: +patch
nosy: +lum
Added file: http://bugs.python.org/file27674/filetype11175.patch

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