Re: issue with struct.unpack

Path	csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<python@mrabarnett.plus.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.000
X-Spam-Evidence	'H': 1.00; 'S': 0.00; 'argument': 0.04; 'subject:skip:s 10': 0.05; 'complaining': 0.09; 'errors:': 0.09; 'extension,': 0.09; 'unpack': 0.09; 'file,': 0.15; 'csv': 0.16; 'csv,': 0.16; 'data)': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; "isn't.": 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'node.': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'reproduce': 0.16; 'subject:issue': 0.16; 'which,': 0.16; 'string': 0.17; 'wrote:': 0.17; 'tries': 0.17; 'import': 0.21; 'struct': 0.22; "i've": 0.23; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'looks': 0.26; '(most': 0.27; 'i.e.': 0.27; 'instead.': 0.27; 'lines': 0.28; 'node': 0.29; 'received:192.168.1.3': 0.29; 'read,': 0.29; 'file': 0.32; 'received:84': 0.32; 'print': 0.32; 'traceback': 0.33; 'to:addr:python-list': 0.33; 'text': 0.34; 'list': 0.35; 'lists.': 0.35; 'said,': 0.35; 'but': 0.36; 'subject:with': 0.36; 'data': 0.37; 'subject:: ': 0.38; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'received:192.168': 0.40; 'series': 0.63; 'header:Reply-To:1': 0.68; 'below:': 0.71; 'reply-to:no real name:2**0': 0.72; 'reply- to:addr:python.org': 0.84
X-CM-Score	0.00
X-CNFS-Analysis	v=2.0 cv=IekFqBWa c=1 sm=1 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=DKcI9XZsuF4A:10 a=ihvODaAuJD4A:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=yG90urYR2E8A:10 a=EBOSESyhAAAA:8 a=8AHkEIZyAAAA:8 a=fZnMoana3Hbipd0u_n0A:9 a=wPNLvfGTeEIA:10 a=0nF1XD0wxitMEM03M9B4ZQ==:117
X-AUTH	mrabarnett:2500
Date	Tue, 28 Aug 2012 23:49:50 +0100
From	MRAB <python@mrabarnett.plus.com>
User-Agent	Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20120713 Thunderbird/14.0
MIME-Version	1.0
To	python-list@python.org
Subject	Re: issue with struct.unpack
References	<2cc8b390-0b7a-4a0f-ac88-113daf65eba5@googlegroups.com> <5653b3e0-1e37-4f70-8257-6630eacdce5f@googlegroups.com>
In-Reply-To	<5653b3e0-1e37-4f70-8257-6630eacdce5f@googlegroups.com>
Content-Type	text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding	7bit
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.12
Precedence	list
Reply-To	python-list@python.org
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.3907.1346194193.4697.python-list@python.org> (permalink)
Lines	36
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1346194193 news.xs4all.nl 6962 [2001:888:2000:d::a6]:35126
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:28029

Show key headers only | View raw

On 28/08/2012 23:34, 9bizy wrote:
> This is what I have to reproduce the challenge I am having below:
>
>
> import csv
> import struct
>
>
> data = []
>
> for Node in csv.reader(file('s_data.xls')):

That tries to read the file as CSV, but, judging from the extension,
it's in Excel's format. You don't even use what is read, i.e. Node.

>      data.append(list((file('s_data.xls'))))
>
That opens the file again and 'list' causes it to read the file as
though it were a series of lines in a text file, which, as I've said,
it looks like it isn't. The list of 'lines' is appended to the list
'data', so that's a list of lists.
>
>      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
>
[snip]
It's complaining because it's expecting a string argument but you're
giving it a list instead.

Thread

issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-25 11:34 -0700
  Re: issue with struct.unpack Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-25 20:12 +0100
  Re: issue with struct.unpack MRAB <python@mrabarnett.plus.com> - 2012-08-25 20:16 +0100
    Re: issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-28 15:35 -0700
      Re: issue with struct.unpack MRAB <python@mrabarnett.plus.com> - 2012-08-28 23:53 +0100
      Re: issue with struct.unpack Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-28 22:40 -0400
    Re: issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-28 15:35 -0700
  Re: issue with struct.unpack Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-25 19:31 -0400
    Re: issue with struct.unpack Alexander Blinne <news@blinne.net> - 2012-08-26 14:53 +0200
  Re: issue with struct.unpack MRAB <python@mrabarnett.plus.com> - 2012-08-28 23:49 +0100
    Re: issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-28 16:01 -0700
    Re: issue with struct.unpack MRAB <python@mrabarnett.plus.com> - 2012-08-29 00:36 +0100
      Re: issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-28 16:55 -0700
      Re: issue with struct.unpack 9bizy <a.m.akingbulu-11@student.lboro.ac.uk> - 2012-08-28 16:55 -0700
  Re: issue with struct.unpack Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-28 22:31 -0400

csiph-web