[PoC] add support for Python 3

[mikoim]

I'm trying to add Python 3 support to pyzfs with future module, it has still supported Python 2.7.
Suppose that doing this, is this method (porting with future module) suitable? or adding a sparse compatibility layer?

Progress

• Replace bytes string to unicode
  • Backward compatibility
• Pass all unit tests on Linux
• Pass all unit tests on FreeBSD
  ... etc ...

Tests

Linux

Python 2.7

Ran 362 tests in 21.390s

OK (skipped=40, expected failures=6)

Python 3.6

Ran 362 tests in 21.688s

FAILED (errors=7, skipped=65, expected failures=6)
Test failed: <unittest.runner.TextTestResult run=362 errors=7 failures=0>
error: Test failed: <unittest.runner.TextTestResult run=362 errors=7 failures=0>

[avg-I]

It seems that no one has the write access to this repository now.

[mikoim]

@avg-I omg... I saw that you had bumped up on your repository. Do you have a plan to publish it on PyPI with renaming module name?

[avg-I]

Yes, I am planning to do that.
Thank you for your Python 3 work!

[kippandrew]

Nice work here! Any future plans to finish the python 3 port?

[mikoim]

@kippandrew I'll start porting again in late September.

[CalcMan]

Did this python 3 port ever get finished? Is it available via PyPI as the same, or a different module name? If it's defunct, is there a different module that is a better option now?

[avg-I]

This library is now a part of OpenZFS fka ZoL.