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Date: Thu, 16 Jan 2014 19:40:05 -0600
From: Tim Chase <tim@thechases.com>
To: python-list@python.org
Subject: Re: Guessing the encoding from a BOM
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Xref: csiph.com comp.lang.python:64131

On 2014-01-17 11:14, Chris Angelico wrote:
> UTF-8 specifies the byte order
> as part of the protocol, so you don't need to mark it.

You don't need to mark it when writing, but some idiots use it
anyway.  If you're sniffing a file for purposes of reading, you need
to look for it and remove it from the actual data that gets returned
from the file--otherwise, your data can see it as corruption.  I end
up with lots of CSV files from customers who have polluted it with
Notepad or had Excel insert some UTF-8 BOM when exporting.  This
means my first column-name gets the BOM prefixed onto it when the
file is passed to csv.DictReader, grr.

-tkc