provisioning_uri doesn't work with unicode in python2 about pyotp

[kislyuk]

pyotp uses urllib to do the URI encoding. In python2, urllib doesn't have proper Unicode support; quote() expects bytes where it should expect a string. The solution is to either switch to Python 3, or to encode your unicode strings into byte strings before passing them over to provisioning_uri().

I could make this behavior conditional on Python version in pyotp, but I would prefer not to.

[gdamjan]

or just document the deficiency of python2. that would be enough for me personally, since I already use python3 for my demo stuff.

[kislyuk]

This is a general deficiency of Python 2, and the traceback does indicate that the error occurs in the standard library, so I see no need to note it in our documentation. Thanks for reporting though.