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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: issue with struct.unpack
Date: Tue, 28 Aug 2012 22:31:02 -0400
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Xref: csiph.com comp.lang.python:28038

On Tue, 28 Aug 2012 15:34:11 -0700 (PDT), 9bizy
<a.m.akingbulu-11@student.lboro.ac.uk> declaimed the following in
gmane.comp.python.general:

> 
> for Node in csv.reader(file('s_data.xls')):
>     data.append(list((file('s_data.xls'))))
>     
>     
>     data = struct.unpack('!B4HH', data)
>     print "s_data.csv: ", data
> 
> I tries so many format for the struct.unpack but I got this errors:
> 
> Traceback (most recent call last):
>   
>     data = struct.unpack('!B4HH', data)
> struct.error: unpack requires a string argument of length 11
>

	Which seems reasonable -- you've specified 1 byte, and 5 16-bit
integers => 11 bytes needed for input.

	Have you examined what your input really contains? I see a list
given the combination of .append() and list()
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/