On 16.03.16 02:28, Guido van Rossum wrote:
I agree that the spirit of the PEP is to stop at the first coding
cookie found. Would it be okay if I updated the PEP to clarify this?
I'll definitely also update the docs.
Could you please also update the regular expression in PEP 263 to
"^[ \t\v]*#.*?coding[:=][ \t]*([-.a-zA-Z0-9]+)"?
Coding cookie must be in comment, only the first occurrence in the line
must be taken to account (here is a bug in CPython), encoding name must
be ASCII, and there must not be any Python statement on the line that
contains the encoding declaration. 
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