🌐 Mailman 3 November 1999 - Python-list - python.org

Looking for sshlib.py
by John Leach Dec. 1, 1999

Dec. 1, 1999

Is there an ssh lib for Python. Or anything similar. I'm looking for something more secure than telnet. Any ideas? Write my own? John Leach http://www.bosware.com.au

8 9

Python meta object question
by Mickael Remond Dec. 1, 1999

Dec. 1, 1999

Hello, Is there a way to automatically update the class tree to show the change in inherited class attributes after a class redefinition ? Look at this example: ---------------------------------------- # Step one # First description class company1: company = "Company1" class company2: company = "Company2" class localcompany(company1): localcompany = "STE France" class employee(localcompany): employee = "Me" print print "Step 1:" print localcompany.company # => Company1 print employee.company # => Company1 # Step two # localcompany is sold to company2 class localcompany(company2): localcompany="New STE France" print print "Step 2:" print localcompany.company # => Company2 print employee.company # => Company1 (outdated!) # Step three # Force employee class update (same class definition) class employee(localcompany): employee = "Me" print print "Step 3:" print localcompany.company # => Company2 print employee.company # => Company2 ------------------------------------------------------------- This case is very simple but when the class tree becomes complicated it is difficult to keep all class up to date. Is there a way to redefined only one class, as in step 2 and have all the other class automatically take this change into account ? Thank you in advance for your help. Mickael Remond

5 5

Modules/getpath.c chases links?
by Edward Jason Riedy Dec. 1, 1999

Dec. 1, 1999

Is there a reason why Modules/getpath.c chases links to get the `correct' path? I'd like to see that removed, but the comments make me think someone had a specific reason for including it. I use symlink trees to separate out different versions of packages distributed by different people (here, stock python 1.5.2 and the LLNL-distributed NumPy). The symlink chasing breaks this badly by looking into the symlinked directory rather than using the tree of symlinks. Simply removing the code protected by HAVE_READLINK makes my life much nicer. I'd really like to see it officially removed. (If you want a full-featured system for finding the installation, check the kpathsea library in the Web2C distribution of TeX.) Jason (not subscribed, please cc)

2 2

WinNT and python as text filter...
by tottinge＠concentric.net Dec. 1, 1999

Dec. 1, 1999

I'm working in WinNT with VIM (good tool) and wanted to write some handy filters in python to help me with routine editing chores. I run my python command at the command line and get the output I want printed nicely on my screen. However, if I pipe it to a file the file comes out empty, if I pipe it to more I get nothing at all. Does python know it's in a pipe and act differently? Does 'print' not work right in NT? What's up? My python is: PythonWin 1.5.2 (#0, Apr 13 1999, 10:51:12) [MSC 32 bit (Intel)] on win32 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam Portions Copyright 1994-1999 Mark Hammond Tim

4 4

XML tool status?
by Greg Wilson Dec. 1, 1999

Dec. 1, 1999

Hi. I've gone through the Python/XML HOWTO, and would like to start playing with the DOM module it describes, but: 1) I can't find a Windows version of the software; and 2) the Python XML SIG status page has a "most recent update" date from December 1998 --- is that fossilware, or has there really not been anything new posted since then? Thanks, Greg

6 5

python test frameworks
by quinn＠groat.ugcs.caltech.edu Dec. 1, 1999

Dec. 1, 1999

I know this sort of thing has been talked about before, but I'm looking for some information on techniques for self-testing pyhon code (something I should have been doing before, but only now am I writing a system complex enough to warrant it). I remember Tim's thread about his doc-string embedded testing, and that looked interesting, but I can't find it now. And links to discussions of the merits of different strategies would be good, too. thanks

6 7

Re: Python complaints
by Dan Schmidt Dec. 1, 1999

Dec. 1, 1999

Mark Carroll <markc(a)chiark.greenend.org.uk> writes: | Basically, I'd be really interested to learn: what _don't_ people | like about Python? Every language has things that many people | complain about, however reasonably, or would like to have been | different, and I'd be interested to know what Python's are so I can | get an idea if any are going to annoy me, rather than me being | confused then frustrated then disappointed about them as I discover | them further in. For instance, I'm sure plenty of people would hate | Modula-3's lack of implicit casting, need to define everything | before using it, Pascal-style uppercase keywords, etc. Are there any | ways that Python makes programming slightly more awkward than people | would have liked? The main thing I find frustrating is that lambdas are not very powerful. Much of the time that I would use a simple 'map {}' in Perl, I find that I have to write a separate function, or iterate by hand. My understanding, though, is that there's no plan to make lambdas more powerful, which is a bit disappointing to me. Michael Hudson's bytecodehacks do ameliorate some of my problems with trying to write in a functional style. I hope they make it into the standard library at some point. -- Dan Schmidt | http://www.dfan.org

2 1

PyArg_ParseTuple() and oprtional remaining argument lists
by phil＠ricochet.net Dec. 1, 1999

Dec. 1, 1999

Hi, i've developed an extension .dll in C for a Window's based system and it works really well. However, i wanted to add a function that took a second optional argument so wrote the following: ...blah... if (PyArg_ParseTuple(args,"s|s",&name,&show)) { // happy things. and it seems to return 0 if only one parameter is supplied, yet is happy with two. It's not a major inconvenience as i can just document it as requiring two parameters, but i'd like to know what i'm doing wrong here. I also have trouble using PyArg_ParseTuple(...) with a single item, e.g. if (PyArg_Parse(args,"i",&index) && (index >= 0)) { is ok, but if (PyArg_ParseTuple(args,"i",&index) && (index >= 0)) { fails. Again not a major problem, i'm more concerned that i'm doing something wrong that will bite me later (this was cut and pasted from my code, so the syntax may be a little suspect...) The documentation shows examples of the above working correctly. I'm using 1.52. I'm sure it's something silly. Gracias Mi Llama es su Llama. phil. The world is divided into two sorts of people: those that think the world is divided into two sorts of people and those that don't.

4 4

how to do *simple* syntax checking?
by Preston Landers Dec. 1, 1999

Dec. 1, 1999

Okay, I know there was an earlier thread regarding pre-distribution syntax checking (and the virtual impossibility of same). I understand Python is a dynamicly typed language, and I have no real need to be able to find previously undeclared names in code before I run it. However, it would be enormously helpful for me to be able to do *simple* checks on Python code at make/'make install' time. Like catching whitespace/indentation problems, missing semicolons, and the like. I maintain a large set of Python programs, some of which are accessed through a CGI interface. I develop some code, run make install, restart my web server (not always though) and then load up my URL. Only to find "500 Internal Server Error." Usually, if it's not a namespace issue, it's something silly like a missing semicolon. But I have to track through the server logs to find out what went wrong. I thought that Python's compile() function would be what I want, because I thought that the SyntaxError exception was thrown when making bytecode. But that's not the case, unless I was notably un-thorough in my investigation. Basically, what I want is to do something like this for every Python program in my makefile: try: simple_syntax_check("myfile.py") except: # file is no good, abort make process # ... continue with make Am I just dreaming? Is this unrealistic? Or is this kind of thing fully availible and documented and I am just blind? thanks, ---Preston -- || Preston Landers <prestonlanders(a)my-deja.com> || Sent via Deja.com http://www.deja.com/ Before you buy.

3 2

Re: '==' vs. 'is' behavior
by François Pinard Dec. 1, 1999

Dec. 1, 1999

duncan(a)rcp.co.uk (Duncan Booth) writes: > >>> print a is b By the way, is there common wisdom (or rather, maybe, usage-standards-to-be) about using `is' instead of `=='? In most cases I have seen so far, it is unusual that one really has to resort to `is', because `==' usually does something proper on average. But even then, I prefer writing `is None' than `== None', because it is more exact. I could of course use the tested things as mere logical values, as a way to escape that tiny problem (:-), but sometimes it is just clearer to write things explicitly. So, I was just wondering if someone would not have a clear set of good habits on that matter. (I feel just a bit like "Mégère", who indirectly induced the Trojan war by offering the golden apple to three goddesses :-). -- François Pinard http://www.iro.umontreal.ca/~pinard

7 6