On Tue, 15 Mar 2016 at 13:31 Guido van Rossum <gu...@python.org> 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 I think the spirit of PEP 263 is for the first specified encoding to win as the support of two lines is to support shebangs and not multiple encodings :) . I also think the fact that tokenize.detect_encoding() <https://docs.python.org/3/library/tokenize.html#tokenize.detect_encoding> doesn't automatically read two lines from its input also suggests the intent is "first encoding wins" (and that is the semantics of the function).
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