Guessing the encoding from a BOM

[Chris Angelico]

On Thu, Jan 16, 2014 at 1:13 PM, Steven D'Aprano
<steve+comp.lang.python at pearwood.info> wrote:
>     if sig.startswith((b'\xFE\xFF', b'\xFF\xFE')):
>         return 'utf_16'
>     elif sig.startswith((b'\x00\x00\xFE\xFF', b'\xFF\xFE\x00\x00')):
>         return 'utf_32'

I'd swap the order of these two checks. If the file starts FF FE 00
00, your code will guess that it's UTF-16 and begins with a U+0000.

ChrisA