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

problem with Fnorb and module new
by Jim Kerr June 30, 1999

June 30, 1999

I just tried installing Fnorb on HP-UX 10.20... the install went smoothly, but when I tried stepping through the Hello World example, python complained about not being able to find module new. The complaint is certainly valid -- I can't find new.py anywhere either. Anyone know what's going on here? $ fnidl HelloWorld.idl Traceback (innermost last): File "/users/jbkerr/python/Python-1.5.1/site-packages/Fnorb/script/fnidl", line 2, in ? import sys; from Fnorb.script import fnidl; sys.exit(fnidl.main(sys.argv)) File "/users/jbkerr/python/Python-1.5.1/site-packages/Fnorb/script/fnidl.py", line 41, in ? from Fnorb.orb import CORBA, Util File "/users/jbkerr/python/Python-1.5.1/site-packages/Fnorb/orb/CORBA.py", line 38, in ? import fnorb_thread, TypeManager, Util File "/users/jbkerr/python/Python-1.5.1/site-packages/Fnorb/orb/Util.py", line 38, in ? import keyword, new, string, UserList ImportError: No module named new -- Jim Kerr Hewlett-Packard Santa Rosa Systems Division 1400 Fountaingrove Pkwy, MS 3USZ Santa Rosa, CA 95403 Phone: 707-577-5575 Telnet: 577-5575

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A Python problem?
by Colin J. Williams June 30, 1999

June 30, 1999

This script below illustrates what appears to be a problem with the identification of a module in a package. The example is borrowed from the linbot material. Colin W. ''' A Python problem? . ''' def main(): import sys print 'Start:',dir() s0= sys.modules import plugins.rptlib s1= sys.modules if s0 == s1: print 'sys.modules is unchanged' print 'After attempt to import plugins.rptlib:', dir() try: print dir(plugins.rptlib) except AttributeError: import sys print sys.exc_info() from plugins.rptlib import * print 'rptlib names now available:', dir() main() ''' ------------------------ Resulting Display ---------------------------- >>> Start: ['sys'] sys.modules is unchanged After attempt to import plugins.rptlib: ['plugins', 's0', 's1', 'sys'] (<class exceptions.AttributeError at 76bbc0>, <exceptions.AttributeError instance at daa0e0>, <traceback object at dab2b0>) rptlib names now available: ['Link', 'add_problem', 'check_and_warn', 'config', 'debugio', 'doBotMain', 'doTopMain', 'get_title', 'linbot', 'linkList', 'main_index', 'make_link', 'nav_bar', 'open_file', 'opener', 'os', 'plugins', 'problem_db', 'proxies', 'read_registry', 's0', 's1', 'sort_by_age', 'sort_by_author', 'sort_by_rev_age', 'sort_by_size', 'string', 'stylesheet', 'sys', 'urllib', 'version'] '''

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Re: Reflection in Python?
by rwentwor＠bna.com June 30, 1999

June 30, 1999

Assuming you're working with Python class instance objects, something like the following might work: # define class class SillyMathTest: def testAdd(self, x, y): return x+y # create class instance object MathTest = SillyMathTest() # get reference to bound method MathTest.testAdd test = getattr(MathTest, "testAdd") # effectively do MathTest.testAdd(3,5) test(3,5) As to getting naming info: well, you already have the name of the method as a string, you can get the name of the class as MathTest.__class__.__name__, but there is no way to extract the string "MathTest" from the MathTest object because "MathTest" is the name of a variable referencing the object, not something that is really part of the object. (You couldn't do this in Java either, so I'm not sure what you had in mind.) Bob Wentworth --original message-- I've just started programming in Python, and I could really use some help figuring out something. I'd like to implement Kent Beck's unit tester in Python (someone posted a very nice alternative a few weeks ago, but Junit's approach works better for my project's needs). How do I do the equivalent of what Java calls reflection? I wantto do the following: test = MathTest("testAdd") where test.run() will run the "testAdd" method on the MathTest object? I also want to be able to tell the user the name of the object (MathTest) and the method in case the method fails. Anythoughts?

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socket timeouts
by Nathan Clegg June 30, 1999

June 30, 1999

Is there any way to set the timeout for a TCP/IP connection? Specifically, I'm writing some apps meant to run on the same machine, so if they can't connect *immediately* (i.e. the server app is not running), I need to go to plan B. Any answers or alternate solutions? I'm also interested in a similar issue across the internet, but I'm more generous about timeouts in this circumstance. Thanks. ---------------------------------- Nathan Clegg nathan(a)islanddata.com

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Python Editor
by Jose A. Antich June 30, 1999

June 30, 1999

Does anyone know if there's any Python Editor for the MAc? Thank's

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Problem with bsddb on NT
by rdev＠my-deja.com June 30, 1999

June 30, 1999

I've been using bsddb on both Unix and NT and I found a very serious bug on the NT side: Using database opened with btopen: If I write random length records using a six byte key (arbitrary), the bsddb will crash with a protection exception after writing, typically, between 50 and 5000 records. Using database openend with hashopen: Same test as above, but rather than crashing with a protection exception, it generates a python exception as follows: Traceback (innermost last): File "Prog\bsddb_test.py", line 52, in ? test () File "Prog\bsddb_test.py", line 49, in test adb[key] = rec bsddb.error: (0, 'No error') It's easy to recreate using the test program below. It works just fine on Unix but dies quickly on NT. If anyone has any ideas at all, please help. This is a critical problem and I can't seem to find any workaround. Test Program: import random import bsddb import os # Test overview: # # Write a random length record between 1 and 1000 bytes, # using a 6 byte random valued # key. Repeat until the database crashes (typically between # 50 and 5000 writes. # # Crashes in different ways depending on whether bsddb was # opened as btree or hash database. def test (): count = 0 # Remove any old database in order to start clean try: os.remove('test.db') except: pass # Either open bsddb in hash mode or btree mode. # Each fails in its own way. adb = bsddb.btopen ('test.db', 'c') #adb = bsddb.hashopen ('test.db', 'c') # Generate a long constant string (1001 chars) longstring1 = 'a' * 1001 while 1: # Generate a large random string num = random.random() longstring = str(int(num * 1000000)) * 200 # Pick a record length from 1 to 1000 reclen = int(random.random() * 1000) + 1 # Use a keylen of 6 (arbitrary) keylen = 6 #if keylen + reclen > 214: # continue # Generate a key by taking the first keylen chars # from the long string key = longstring[:keylen] # Generate a record by taking the first reclen chars # from the constant string (contents don't matter here) rec = longstring1[:reclen] count = count + 1 print 'count = ', count print 'lengths = ', keylen, reclen, keylen + reclen print 'Key = ', key # Add it to the database adb[key] = rec test () Sent via Deja.com http://www.deja.com/ Share what you know. Learn what you don't.

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TOOLS USA '99 - Conference Program & Registration Information
by TOOLS Conferences June 30, 1999

June 30, 1999

************************************************************** C O N F E R E N C E A N N O U N C E M E N T TOOLS USA '99 Technology of Object-Oriented Languages and Systems 30 Int'l Conference & Exhibition "DELIVERING QUALITY SOFTWARE - THE WAY AHEAD" Santa Barbara, Calif., August 1-5, 1999 Fess Parker's Double Tree Resort HELD IN COOPERATION WITH Regional Small Business Innovation Research (SBIR) Workshop - August 4, 1999 & National Defense Planning And Analysis Society (DPAAS) Annual Symposium - August 5, 1999 http://www.tools.com/usa ************************************************************** CONFERENCE PROGRAM ~~~~~~~~~~~~~~~~~~~~ * Keynote presentations by world-class visionaries: David Parnas, McMaster University, Canada Bertrand Meyer, ISE, USA Don Box, DevelopMentor, USA Tucker Taft, AverStar, USA * Hands-on tutorials by recognized experts: 30 tutorials, in six tracks: Quality, Languages, Technology, Methodology, Experience, and Management TUTORIAL PROGRAM Systematic Techniques for Inspecting Critical Software David L. Parnas, McMaster University, USA The Development and Verification of Safety Critical Software George Romanski, Aonix, USA Managing By Contract Bertrand Meyer, Interactive Software Engineering, USA Verification and Validation of Object-Oriented Software Systems Kasi Periyasamy, University of Manitoba, Canada Mastering JFC 'Look and Feel' and UI Delegation Mitchell Goldstein, Modis Inc., USA Quality Component Development: Making the Most of JavaBeans and Enterprise JavaBeans Features Gilda Pour, San Jose State University, USA Ada and the Objects Benjamin Brosgol, Aonix, USA Programming with C++ Exceptions Angelika Langer, Germany Behind the Beans Michael Stal, Siemens AG, Germany Java, Eiffel and C++: The Language Comparison Ian Joyner, Microsoft Research Institute, Australia Mastering the Windows Eiffel Library Glenn Maughan, Westernport Group Pty Ltd, Australia & Raphael Simon, ISE, USA Distributed Objects from a Patterns Perspective Michael Stal, Siemens AG, Germany Building Scalable ODBMS Applications Matt BenDaniel, Object Design, USA Real-Time Object-Oriented Distributed Systems: RT CORBA and RMA Antonios Broumas, Tri-Pacific Software, USA System Design: Architectures and Archetypes Stephen J. Mellor, Project Technology, USA A Short Use Case Writing Workshop Alistair Cockburn, Humans & Technology, USA Modularization Revisited: Aspects in the Design and Evolution of Software Systems Cristina Videira Lopes, Xerox Research Center, USA Advanced Visual Modelling: Beyond UML Stuart Kent, University of Kent, UK; Joseph Gil, Technion, Israel; and John Howse, University of Brighton, UK Advanced OO Modelling: Metamodels and Notations for the Next Millenium Brian Henderson-Sellers, University of Technology, Sydney, Australia Analysis by Contract: An Introduction to Precise OO Modeling with UML and OCL Richard Mitchell, University of Brighton, UK Design of Commercial Object-Oriented Applications - The Patterns Frieder Monninger, Object Tools GmbH, Germany Octopus/UML: An Object-Oriented Method Used in Industry Rallis Farfarakis, Nokia Research Center, Finland Analysis, Design and Implementation of Distributed Java Business Frameworks using Domain Patterns Ali Arsanjani, IBM Enterprise Java Services, USA Requirement Patterns Christopher Creel, Technical Resource Connection, TRC Introduction to the OPEN Method with UML Brian Henderson-Sellers, University of Technology, Sydney, Australia Effective Strategies and Techniques for Rapid Object-Oriented Application Development Michael P. Anton, Financial Technology Solutions, USA Software Development "in the Zone" Todd Lauinger, Reliastar Inc., USA Creating Social Agents with Reusable Components: A Practitioner's Guide Dana Moore, AT&T Labs., USA Features of UML Tools (live demo) Tony Wasserman, Software Methods and Tools, USA * Interactive workshops on the most innovative issues * Lively panel discussions: including the famous "Great Language Debate" * 37 Technical paper presentations: selected by the international program committee * Eiffel Summit '99 annual Eiffel users forum * Symposium on Teaching Object Technology (STOT) "Using Information Technology to Teach Object Technology" * Special pre-conference session: "Object Technology: An Executive Overview" * Regional Small Business Innovation Research (SBIR) Workshop Sponsored by Frontier Technology, Inc. * National Defense Planning And Analysis Society (DPAAS) Annual Symposium Sponsored by Frontier Technology, Inc. * Exhibition of the latest products, services, and research only a few booths left... * Complementary events: user meetings, working group discussions, BOFs, etc. * An attractive social program in the superb Santa Barbara area. ******************************************************************** FULL CONFERENCE PROGRAM & REGISTRATION INFORMATION at http://www.tools.com/usa (also see registration from below) If you wish to obtain your own copy of the conference program, please send your mailing information to tools(a)tools.com TOOLSthe major international events entirely devoted to the applications of object-oriented technology ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ FOR MORE INFORMATION ON TOOLS USA '99 OR ANY OTHER EVENTS IN THE TOOLS CONFERENCE SERIES, VISIT OUR WEB SITE AT http://www.tools.com OR CONTACT US AT tools(a)tools.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ T O O L S U S A ' 9 9 R E G I S T R A T I O N F O R M email form to tools(a)tools.com print and fax to 805-685-6869 phone us at 805-685-1006 or register online at http://www.tools.com/usa 1. PERSONAL INFORMATION First Name: Last Name: Job Title: Company: Address: City: State: Zip: Country: Phone: Fax: Email: 2. REGISTRATION PACKAGES |_| 1 day ($495): August __ |_| 2 consecutive days ($795): August __-__ |_| 3 consecutive days ($1045): August __-__ |_| 4 consecutive days ($1295): August 2-5 |_| SBIR ($195): Wednesday, August 4 |_| DPAAS ($195): Thursday, August 5 |_| Eiffel Summit '99 ($495): Tuesday, August 3 |_| Introduction to Object Technology : Sunday, August 1 ($395 with conference registration*; $495 on its own) |_| Symposium on Teaching Object Technology (STOT): Sunday, August 1 ($300 with conference registration*; $395 on its own) |_| Free Exhibit-only Pass (free) *if registered for at least two TOOLS conference days NOTE: - Rates shown above are for regular registrations - Academic and Group Discounts available - Early-Bird prices shown above are valid until July 2 See details online at http://www.tools.com/usa/reg.html I PLAN TO ATTEND: (list TOOLS sessions by code; e.g. LANG1, METH2) 3. MEAL TICKETS AND ACTIVITIES Full registrations include lunches, BBQ dinner, and conference dinner. Academic Participants must purchase meal tickets separately |_| __ Conference lunches ($20 each) |_| __ Beach Barbecue ($30): Monday, August 2 |_| __ Conference Dinner ($60): Wednesday, August 4 |_| I am a vegetarian. |_| __ Golf Tournament ($95) 4. PAYMENT Registration Total $________ I wish to pay by: |_| Check or International Money Order #___________ enclosed |_| Inter-bank wire transfer ($15 additional charge) |_| Credit Card: __ Visa __ Mastercard __ American Express Credit card #: Expiration date: Cardholder Name: 5. HOW DID YOU FIND OUT ABOUT TOOLS?

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looking for cookie.py
by Mathieu Lecarme June 30, 1999

June 30, 1999

the link on python web site doesn't work! where can i find it?

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A Certifiable Very Cool Trick
by Barry A. Warsaw June 30, 1999

June 30, 1999

Just a quick note because this is way too cool not to share. When python.org came back up today, it almost immediately got cpu slammed (and has been for at least the last 3 hours). I know what's going on -- it has to do with performance problems in Mailman that in this case was triggered by a flood of incoming messages to all the mailing lists. This Mailman problem has been seen by a few other users, but it's dang hard to track down. Guido, Jeremy, and I got to talking about what tools we'd like to have to help debug this problem. My model was gdb's attach feature where you can attach to, stop and trace through a running external C program. I would love to be able to do the same thing at the Python level. We started talking about remote pdb's with threads listening on sockets, etc. (still cool ideas but more work). I mentioned that I'd love to be able to just get a traceback of where the program is currently stopped. Even if it hoses the interpreter afterwards, it would still be incredibly useful. Guido and I spent some fun after hours hacking time and came up with the following trick. [This is described in terms of gdb, but you might be able to do something similar with dbx or other Unix and non-Unix debuggers, I dunno] First, get the pid of the running Python process. Start up gdb on the python executable and at the gdb prompt type "attach XXX" where XXX is the pid. Now, at the gdb prompt, type the following: (gdb) call PyRun_SimpleString("import sys, traceback; sys.stderr=open('/tmp/tb','w',0); traceback.print_stack()") Sitting in /tmp/tb will be the stack trace of where the Python program was when you stopped it! There's reason to believe this will not always work, and it could seriously confuse your interpreter depending on where it stops. But every time I've tried it it /does/ work, and you can even detach the program and let it continue on! Chris Tismer, somehow I think your stackless Python might either make this trick harder or much easier :) makes-this-geek-quiver-with-joy-but-my-mom-would-just-scratch-her-head-ly y'rs, -Barry

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PySequence_Check
by rasumner＠bach.wisdom.weizmann.ac.il June 30, 1999

June 30, 1999

How can I do the equivalent of a PySequence_Check in Python? GvR told me that the question was illdefined (if I explained it correctly) and to ask here. It seems that some of the functions in abstract.h are available from python (len(), callable()) and others are not (PySequence_Check, PyNumber_Check). What am I missing? I have a nested structure of lists and tuple and I just want to know when I have bottomed out. I can check for tuple or list indivually but that is ugly and inflexible. I could just try indexing and see if there was an exception but that is not much better. Reuben

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