🌐 Mailman 3 October 2005 - Python-list - python.org

help with sending data out the parallel port
by David Nov. 5, 2005

Nov. 5, 2005

I'm wondering if python is capable of fairly precise timing and also sending data out the parallel port. For example ; making a 7.5 KHz square wave come out of one of the data pins on the printer port. I've tried to help myself with this one but searching in the "Python Library Reference" that installed with my version, [ Python 2.4.1. ] yielded nothing on the subject of either timing or parallel port. Id be thankful for any help. David KG2LI

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how to associate files with application
by Ashok Nov. 3, 2005

Nov. 3, 2005

hi, i want to know how to make a specific type of file open in an application i developed in python when the user clicks on the file.(in windows) for eg. a .txt file when clicked opens in notepad, a .doc file when clicked opens in MS-word. In the same way i want to make a .xyz file open in the application i developed when clicked. thanks in advance for any advice.

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Rich __repr__
by Ben Finney Nov. 3, 2005

Nov. 3, 2005

Howdy all, The builtin types have __repr__ attributes that return something nice, that looks like the syntax one would use to create that particular instance. The default __repr__ for custom classes show the fully-qualified class name, and the memory address of the instance. If I want to implement a __repr__ that's reasonably "nice" to the programmer, what's the Right Way? Are there recipes I should look at? -- \ "For certain people, after fifty, litigation takes the place of | `\ sex." -- Gore Vidal | _o__) | Ben Finney

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Scanning a file
by pinkfloydhomer＠gmail.com Nov. 2, 2005

Nov. 2, 2005

I want to scan a file byte for byte for occurences of the the four byte pattern 0x00000100. I've tried with this: # start import sys numChars = 0 startCode = 0 count = 0 inputFile = sys.stdin while True: ch = inputFile.read(1) numChars += 1 if len(ch) < 1: break startCode = ((startCode << 8) & 0xffffffff) | (ord(ch)) if numChars < 4: continue if startCode == 0x00000100: count = count + 1 print count # end But it is very slow. What is the fastest way to do this? Using some native call? Using a buffer? Using whatever? /David

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Spambayes modifications with web services
by benmorganpowell＠gmail.com Nov. 2, 2005

Nov. 2, 2005

In the last few months many personal website owners (such as myself) have found that spammers have been using their domain names to masquerade as valid users to send spam, normally in the form of: JoeMarkBlogs(a)mydomain.com This new tactic has an annoying problem, which is that the bounced emails end up back with the postmaster at the innocent persons domain. This is normally the first time that the domain owner realises that there is a problem. I am one of those people and currently have nearly 3 thousand bounces in my catch all POP3 box. Solutions I can see to this are one of two things: 1) Delete the email as it arrives and ignore it. Realise that the domain name might end up being blacklisted as a spammer's domain and be done with it, or 2) Fight back! All of the bounced emails contain at least one URI to a spammer website, in a effort to sell "Cheap Meds" or "Faked Rolexes" or similar. The format is usually something like this: http://www.sickmate.info/?a2fb9e415e74beS9cdee919d78Sa6a7d The query part of the URI I believe provides the reference between the email address and the visit. Hence if you visit the website with this link, your email address is saved in a database as one that is a) valid, and b) dumb enough to visit the website. The spammers rely on the fact that some people will visit this website and buy from them. In fact, Q.E.D., some people must buy from these websites via spam, otherwise the spammers would have given up a long time ago*. So, as a web programmer and someone who specialises in getting good results on Google, I realised that I could simply post every spammer website on a Google optimized page, which if searched for on Google would return something like: "WARNING: DO NOT BUY FROM THIS WEBSITE. THE SPAMMER IS A RUSSIAN MAFIA CROOK WHO WILL STEAL YOUR MONEY." ...Or something equally obvious along those lines. In this way we attack the websites that are the link between the spam and the money. The real necessity therefore is to: a) Process the received bounced messages quickly and list them on the website without delay. b) Prevent the spammer using the domain The answer to (b) I cannot find. I thought SPF might help, but it is not a panacea. The answer to (a) I need help with! So, I'm on Windows XP. I use Outlook 2002 and I already have the excellent (and FREE) SpamBayes Outlook add-in** that blocks spam and loves ham. Spambayes is open source and as such I can modify the source code, recompile it and install it afresh. However, the problem is that I'm not a python programmer, and I'm not sure where to start. This is what I want to do, so if anyone would like to direct me, I'd be grateful: 1) Add a menu option to the SpamBayes add-in - "Post Spam Site to Web Service". I'm guessing I can add a new line to the addin.py such as below, but how do I sink the event? self._AddControl(popup, constants.msoControlButton, ButtonEvent, (PostSpamSite, self.manager,), Caption="Post Spam Site to Web Service", Enabled=True, Visible=True, Tag = "SpamBayesCommand.PostSpam") 2) Add a configuration setting, so that the web service location can be set. I'm guessing this is in config.py. Pointers welcome. 4) Add a function to extract all links in a block of text. I have written a good one of these for .NET, but I'm not sure if, or how it would work in Python: string hrefPattern = @"(?<all>(?:(?<protocol>http(?:s?)|ftp)(?:\:\/\/))" + @"(?<domain>[^/\r\n\:]+)?" + @"(?<port>\:\d+)?" + @"(?<path>[^\?#]*)?" + @"(?<qrystr>\?\w*)?" + @"(?<bookmark>\#\w*)?)"; // Regular Expression Regex hrefRegex = new Regex(hrefPattern, RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace | RegexOptions.IgnoreCase); Any help with this welcome. Do I need a specific Python regex library or can I use the .NET regex library in Python? 4) Connect to web service using SOAP and consume that service. Service will provide: a) Authorise (username, password) - returns access b) Submit (domain) - returns success or failure Can I use SOAPpy for this? Can anyone give me any examples or point me in the right direction? 5) Provide another option in the add in to "Scan folder and Post Spam Sites to Web Service", in the same manner as "Filter messages" works now. Can I use filter.py as a model to work from? Summary ================================= I am not a Python programmer per se but have no problem with getting my hands dirty. I have already got the basics of this working as a Windows.Forms application, but running both that and Outlook together is daft. The Spambayes project already does the hard bit in classifying the spam, so it makes sense to hang off the back of it. Has anyone else had similar problems as me with these "phantom" email addresses being using by spammers and would like to work with me on this? Would anyone in the Spambayes team like to have a go at this, or point me in the right direction? Has anyone had a go at hacking around with the SpamBayes source code and knows what I should do? Basically any help is extremely welcome! Regards Ben * There must obviously be enough people out there who can't get an erection or dumb enough to munch pills to get slim rather than endure a bit of excercise. That being said, they will also trust their credit card to a bunch of crooks who even if they send you the pills, will probably sent you rat poison! ** Get the FREE Spambayes Outlook add-in from http://sourceforge.net/projects/spambayes

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Windows - Need to process quotes in string...
by Ernesto Nov. 2, 2005

Nov. 2, 2005

I'm trying to use a $ delimeter, but it doesn't seem to work. Here is the code: launchWithoutConsole("devcon.exe",d'$enable "@USB\VID_0403&PID_6010&MI_00\7&15E4F68&1&0000"$) I want to send the string parameter: enable "@USB\VID_0403&PID_6010&MI_00\7&15E4F68&1&0000" to the program devcon. The argument itself is a string, but has quotes inside too. I've tried it many different ways and I keep getting syntax errors. Thanks,

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'super' to only be used for diamond inheritance problems?
by Alex Hunsley Nov. 2, 2005

Nov. 2, 2005

I've seen a few discussion about the use of 'super' in Python, including the opinion that 'super' should only be used to solve inheritance diamond problem. (And that a constructor that wants to call the superclass methods should just call them by name and forget about super.) What is people's opinion on this? Does it make any sense?

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tachometer diagram
by Andreas Kaiser Nov. 2, 2005

Nov. 2, 2005

Hello, I'am searching for a python solution for display a tachometer diagram. I prefer a solution for wxPython. The plot libraries I've found do not implement this diagram type. Any hints welcome! Thanks Andreas

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Expanding Python as a macro language
by qwweeeit＠yahoo.it Nov. 1, 2005

Nov. 1, 2005

Hi all, when I moved from Windows to Linux I choosed Python as my language of reference and as GUI, Qt (not much investigated up to now). Till now I didn't regret but one thing: Python can't act as a macro language and so you are obliged to revert to Windows to use programs like AutoIt, Macro Express or Macro Scheduler or even the macro features of Office with VBA. Claudio Grondi expressed almost the same ideas in answering to a post: > What I can point you to is not Python, but embedding it in Python > is a question of executing one line of Python code triggering its > execution. > I think you will be fascinated by its features and ease of use > and how well it is suited to fit into your needs: > http://www.autoitscript.com/autoit3/index.php > With it you will start to see, that forcing to obey to Windows way > of doing things has not only bad sides. In answering to him I expressed the idea to use Windows and AutoIt 3 for automation purposes. But then I changed idea... Also if it is already one year that I try to find a solution in Linux (mainly with Python or DCOP and KDE), I am still confident that there is a solution (in Python we have big experts...). Instead of merely "batteries included" we have plenty of already made applications (from graphics to browsing or editing etc.) that can be easily accessed emulating users operations (mainly keystrokes or mouse operations)... Bye.

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frozenset/subclassing/keyword args
by Mark E. Fenner Nov. 1, 2005

Nov. 1, 2005

Hello all, I was migrating some code from sets.ImmutableSet to frozenset and noticed the following: ******code******** #!/usr/bin/env python from sets import ImmutableSet class MSet1(ImmutableSet): def __init__(self, iterArg, myName="foo"): ImmutableSet.__init__(self, iterArg) self.name = myName class MSet2(frozenset): def __init__(self, iterArg, myName="foo"): frozenset.__init__(self, iterArg) self.name = myName m1 = MSet1([1,2,3], myName = "donkey") print m1 print m1.name m2 = MSet2([1,2,3], myName = "kong") print m2 print m2.name *********end code********** *********run********** MSet1([1, 2, 3]) donkey Traceback (most recent call last): File "./setTest.py", line 22, in ? m2 = MSet2([1,2,3], myName = "kong") TypeError: frozenset() does not take keyword arguments *********end run******** I'm missing something and couldn't find it in the docs. Speaking of which, in the docs at the bottom of the description of the builtin set/frozenset, there is a link to a page describing differences between the builtin sets and the sets module sets. This link is broken locally and on the python.org docs. Locally, it reads: file:///usr/share/doc/python-docs-2.4.2/html/lib/module-comparison-to-builtin-set.html While it should read: file:///usr/share/doc/python-docs-2.4.2/html/lib/comparison-to-builtin-set.html Regards, Mark

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