Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeder2.enfer-du-nord.net!newsfeed.eweka.nl!eweka.nl!feeder3.eweka.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.027 X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; 'below)': 0.05; 'script,': 0.07; 'python': 0.08; 'none)': 0.09; '0.0,': 0.16; 'enthought': 0.16; 'ideas?': 0.16; 'nick': 0.16; 'timeout': 0.16; 'windows).': 0.16; 'cc:addr:python-list': 0.16; 'wrote:': 0.16; 'linux': 0.17; 'string,': 0.18; 'header:In-Reply-To:1': 0.22; '(or': 0.23; 'command': 0.24; 'shell': 0.24; 'fine': 0.26; 'windows': 0.26; 'url:mailman': 0.28; 'import': 0.28; 'delay': 0.29; 'print': 0.29; 'script': 0.29; 'cc:addr:python.org': 0.30; 'list': 0.32; 'certainly': 0.32; 'usually': 0.32; 'there': 0.33; 'url:listinfo': 0.33; 'difference': 0.34; 'however,': 0.34; 'trouble': 0.35; 'url:python': 0.36; 'cc:2**1': 0.36; 'skip:i 30': 0.37; 'run': 0.37; 'but': 0.37; 'could': 0.38; 'received:org': 0.38; 'url:org': 0.38; 'subject:: ': 0.39; 'under': 0.39; 'data': 0.39; 'why': 0.39; 'case': 0.39; 'expert': 0.62; 'dear': 0.63; 'reply-to:no real name:2**0': 0.71; 'press': 0.72; 'header:Reply-to:1': 0.84; "skip:' 180": 0.84; 'following.': 0.91; 'subject:Data': 0.93; 'instrument': 0.95 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "Cc" To: spintronic From: Nick Dokos Subject: Re: Data acquisition In-Reply-To: Message from spintronic of "Tue, 25 Oct 2011 08:51:27 PDT." <362e368f-829e-4477-bcfc-c0650d231029@j7g2000yqi.googlegroups.com> References: <362e368f-829e-4477-bcfc-c0650d231029@j7g2000yqi.googlegroups.com> Organization: HPCS X-Mailer: MH-E 8.3; nmh 1.3; GNU Emacs 24.0.90 Date: Tue, 25 Oct 2011 12:29:45 -0400 Sender: nick@dokosmarshall.org Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: nicholas.dokos@hp.com List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 47 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1319560789 news.xs4all.nl 6854 [2001:888:2000:d::a6]:45575 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:14973 spintronic wrote: > Dear friends, > > I have a trouble with understanding the following. I have a very short > script (shown below) which works fine if I "run" step by step (or line > by line) in Python shell (type the first line/command -> press Enter, > etc.). I can get all numbers (actually, there are no numbers but a > long string, but this is not a problem) I need from a device: > > '0.3345098119,0.01069121274,0.02111624694,0.03833379529,0.02462816409,0.0774275008,0.06554297421,0.07366750919,0.08122602002,0.004018369318,0.03508462415,0.04829900696,0.06383554085, ...' > > However, when I start very the same list of commands as a script, it > gives me the following, which is certainly wrong: > > [0.0, 0.0, 0.0, 0.0, 0.0,...] > > Any ideas? Why there is a difference when I run the script or do it > command by command? > > =========================== > from visa import * > > mw = instrument("GPIB0::20::INSTR", timeout = None) > > mw.write("*RST") > mw.write("CALC1:DATA? FDATA") > > a=mw.read() > > print a > =========================== > (That is really all!) > > > PS In this case I use Python Enthought for Windows, but I am not an > expert in Windows (I work usually in Linux but now I need to run this > data acquisition under Windows). > -- > http://mail.python.org/mailman/listinfo/python-list > Shot in the dark: could it be that you have to add delays to give the instrument time to adjust? When you do it from the python shell, line by line, there is a long delay between one line and the next. Nick