Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!news.stack.nl!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'algorithm': 0.04; 'assuming': 0.09; 'bytes.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'thus,': 0.09; '"extended': 0.16; '"python': 0.16; 'int)': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:CSV': 0.16; 'do,': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'header:User-Agent:1': 0.23; 'sorry,': 0.24; 'mention': 0.26; 'values': 0.27; 'header:X -Complaints-To:1': 0.27; 'point': 0.28; 'probably': 0.32; 'raw': 0.33; 'something': 0.35; 'but': 0.35; 'too': 0.37; 'to:addr :python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'read': 0.60; 'extended': 0.61; 'skip:n 10': 0.64; 'skip:] 10': 0.84; 'generation.': 0.91
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Peter Otten <__peter__@web.de>
Subject: Re: CSV methodology
Date: Mon, 15 Sep 2014 09:29:02 +0200
Organization: None
References: <b2q91ada6b59ept81ac65vtnnu6sdklp1h@4ax.com> <mailman.14005.1410678164.18130.python-list@python.org> <i5db1a9s5mvgsmg99q8kqf4l672fbrvp0n@4ax.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Gmane-NNTP-Posting-Host: p57bd87df.dip0.t-ipconnect.de
User-Agent: KNode/4.13.3
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://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: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.14017.1410766159.18130.python-list@python.org>
Lines: 25
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1410766159 news.xs4all.nl 2848 [2001:888:2000:d::a6]:47363
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:77877

jayte wrote:

> Sorry, I neglected to mention the values' significance.  The MXP program
> uses the "distance estimate" algorithm in its fractal data generation. 
> The values are thus, for each point in a 1778 x 1000 image:
> 
> Distance,   (an extended double)
> Iterations,  (a 16 bit int)
> zc_x,        (a 16 bit int)
> zc_y         (a 16 bit int)
> 

Probably a bit too early in your "Python career", but you can read raw data 
with numpy. Something like

with open(filename, "rb") as f:
    a = numpy.fromfile(f, dtype=[
        ("distance", "f16"),
        ("iterations", "i2"), 
        ("zc_x", "i2"),
        ("zc_y", "i2"),
    ]).reshape(1778, 1000)

might do, assuming "extended double" takes 16 bytes.