[Python-Dev] What does a double coding cookie mean?

[Serhiy Storchaka]

On 15.03.16 22:30, Guido van Rossum wrote:
> I came across a file that had two different coding cookies -- one on
> the first line and one on the second. CPython uses the first, but mypy
> happens to use the second. I couldn't find anything in the spec or
> docs ruling out the second interpretation. Does anyone have a
> suggestion (apart from following CPython)?
>
> Reference: https://github.com/python/mypy/issues/1281

There is similar question. If a file has two different coding cookies on 
the same line, what should win? Currently the last cookie wins, in 
CPython parser, in the tokenize module, in IDLE, and in number of other 
code. I think this is a bug.