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From: Grant Edwards <invalid@invalid.invalid>
Newsgroups: comp.lang.python
Subject: Re: write binary with struct.pack_into
Date: Sat, 6 Oct 2012 13:26:44 +0000 (UTC)
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On 2012-10-06, Dennis Lee Bieber <wlfraed@ix.netcom.com> wrote:
> On Fri, 5 Oct 2012 20:27:36 -0700 (PDT), palmeira <palmeira@gmail.com>
> declaimed the following in gmane.comp.python.general:
>
>> 
>> #WRITE
>> fb=open('testOUT.bin')
>
> 	Unless you specify otherwise, open() defaults to read-only

It also defaults to 'text' mode which does cr/lf translaction.  That
will break both reads and writes on any binary file containing 0x0a
and 0x0d bytes.

-- 
Grant