This kata has been solved 231 times in Python.
There was a problem (see my comment above) but I fixed it and now all solutions pass again.
I checked a few of these solutions, they look OK and do handle the katakana alphabet.

Did you read the note in the description (The Python implementation presently requires Unicode conversion, i.e. input.decode('utf-8'), output.encode('utf-8'))?
If you still think that there's a bug, please post your solution (surrounded by a line with three backticks ```) and mark is as "having spoiler content".

No, it is not fixed!

Fixed. Thanks for reporting.

The katana alphabet makes it impossible to do it in python

No problem ;-)

I feel stupid now. You are right, I'm sorry.

Try .inspect maybe?

But it is the exact same input, and two different results. I must missing something, but I can see what.

You're misreading the test, notice how a lot of people managed to pass just fine.

If you say that the same result having to be both true and false at the same time is fine, then it is fine...

What is the problem? Tests are all fine.

You have a test to assert '127.0.0.1' to true and other to false, in Ruby...