🌐 Mailman 3 December 2000 - Python-list - python.org

Controlling the Parallel Port
by Simon Faulkner Jan. 2, 2001

Jan. 2, 2001

Is it easy to control (read/write) the Parallel Port in linux using Python? I am hoping to use it to drive some simple electronics (Usual disclaimer understood - If it smokes then you probably got the wiring wrong!) Simon Simon Faulkner

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Printing with wxPython
by Dale Strickland-Clark Jan. 2, 2001

Jan. 2, 2001

I'm trying to get to grips with wxPython and printing on Windows. Has anyone got a very simple sample that sets up a device context and prints some text or simple graphics? I can't find any printing examples. Thanks for any help. -- Dale Strickland-Clark Out-Think Ltd Business Technology Consultants

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RE: A Suggestion for Python Colon Syntax
by David C. Ullrich Jan. 2, 2001

Jan. 2, 2001

In article <mailman.977685437.23291.python-list(a)python.org>, "Tim Peters" <tim.one(a)home.com> wrote: > [Tim] > > [...] (ditto the whole "while 1" thread > > that's been going on virtually non-stop for a decade). > > [David C.Ullrich] > > and we'll never be certain whether it was an intentional > > joke or not. Keen. > > [Thomas Wouters] > > No, I'm certain Tim did not make that horrible, horrible pun by > > accident. No way could he inflict such amounts of nausea and pain > > by accident. Just not possible :) > > Winkery seems to irk some people so much that I have been experimenting with > leaving it out half the time. It's a Bad Idea, I'm afraid. Witness poor > Greg Ewing, who recently got beat up even in the presence of an explicit > ";-)" thingie. So I resolve to redouble my explicit winking efforts in > 2001, That's too bad. (I mean really: Take for example a little while ago in another place, when I was a bit exasperated at someone who seemed to want the group to do _everything_ for him. I stated that it wasn't possible to write a function in Pascal that would determine whether a filename matched a filter like *.this or that?.ext (the point being sort of it _must_ be impossible, because if it were possible then all he had to do was do it and his problem was solved.) If I'd included an explicit wank it woulda spoiled it, imo. Certainly would have spoiled the fun of reading the replies from people who thought I was serious...) > and those who can detect humor without it will just have to live with > the clues Wait, was that a joke? I'm not certain. ><wink>. yeah, I guess it was. DU > "while-1"-is-a-wonderfully-self-referential-thread-though-ly y'rs - tim > > -- Oh, dejanews lets you add a sig - that's useful... Sent via Deja.com http://www.deja.com/

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Embedding Python in Windows Applications
by gerson.kurz＠t-online.de Jan. 2, 2001

Jan. 2, 2001

If I embedd Python in a Win32 console application (using Demo\embed.c), everything works fine. If I take the very same piece of code and put it in a Win32 Windows application (not MFC, just a plain WinMain()) I see no output (and more importantly so, no errors), because the application does not have a stdout/stderr set up. I have made the following "hack" to make it work (in VisualStudio) // stdout, stderr as defined in the MSVCRT _iob[1] = *fopen("D:\\stdout.log","w"); _iob[2] = _iob[1]; but that surely cannot be a longterm solution. I don't want the output to be written to a temp file, I want to see it in a callback. Is that possible, and if so, how ?

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Reality check PYZOMA = python / zope for Mac ?
by Jason Cunliffe Jan. 2, 2001

Jan. 2, 2001

Hello I am wondering what the prospects are for Python and Zope on Macintosh: Is the mac getting left behind or will the new MacOSX in fact bring Python adn Zope more easily into the fold? I am quite concerned that projects planned for Python and Zope will not be in fact be usable on Macs.. What are the realistic prospects during the next 6-12 months do you think? Does anybody even care anymore? Thanks for any opinions and links.. brief searching for Python and has been a frustrating and confusing experience - Jason ___________________________________________________________ Jason CUNLIFFE = NOMADICS['Interactive Art and Technology']

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fcgi.py
by victor＠prodigy.net Jan. 2, 2001

Jan. 2, 2001

Sorry for newbie questions, but I ran into a couple of problems with fcgi.py. I am using Python 1.5.2 on WindowsNT 4.0. 1) I tried to run fcgi.py from the command line (to exercise its _test() function) and received the following error message: D:/Apps/apache/cgi-bin> fcgi.py Exception exceptions.AttributeError: 'err' in <method FCGI.__del__ of FCGI instance at 82a220> ignored The traceback was: Traceback (innermost last): File "fcgi.py", line 386, in _test req = Accept() File "fcgi.py", line 231, in __init__ _startup() File "fcgi.py", line 367, in _startup s=socket.fromfd(sys.stdin.fileno(), socket.AF_INET, AttributeError: fromfd Seems that the socket module for WindowsNT Python 1.5.2 does not have fromfd() method. Here's the proof (at least for my Python installation): >>> pprint.pprint(dir(socket)) ['AF_INET', 'INADDR_ALLHOSTS_GROUP', 'INADDR_ANY', 'INADDR_BROADCAST', 'INADDR_LOOPBACK', 'INADDR_MAX_LOCAL_GROUP', 'INADDR_NONE', 'INADDR_UNSPEC_GROUP', 'IPPORT_RESERVED', 'IPPORT_USERRESERVED', 'IPPROTO_GGP', 'IPPROTO_ICMP', 'IPPROTO_IDP', 'IPPROTO_IGMP', 'IPPROTO_IP', 'IPPROTO_MAX', 'IPPROTO_ND', 'IPPROTO_PUP', 'IPPROTO_RAW', 'IPPROTO_TCP', 'IPPROTO_UDP', 'IP_ADD_MEMBERSHIP', 'IP_DROP_MEMBERSHIP', 'IP_MULTICAST_IF', 'IP_MULTICAST_LOOP', 'IP_MULTICAST_TTL', 'IP_OPTIONS', 'IP_TOS', 'IP_TTL', 'MSG_DONTROUTE', 'MSG_OOB', 'MSG_PEEK', 'SOCK_DGRAM', 'SOCK_RAW', 'SOCK_RDM', 'SOCK_SEQPACKET', 'SOCK_STREAM', 'SOL_SOCKET', 'SOMAXCONN', 'SO_ACCEPTCONN', 'SO_BROADCAST', 'SO_DEBUG', 'SO_DONTROUTE', 'SO_ERROR', 'SO_KEEPALIVE', 'SO_LINGER', 'SO_OOBINLINE', 'SO_RCVBUF', 'SO_RCVLOWAT', 'SO_RCVTIMEO', 'SO_REUSEADDR', 'SO_SNDBUF', 'SO_SNDLOWAT', 'SO_SNDTIMEO', 'SO_TYPE', 'SO_USELOOPBACK', 'SocketType', '__builtins__', '__doc__', '__file__', '__name__', '_fileobject', '_realsocketcall', '_socketobject', 'error', 'errorTab', 'gethostbyaddr', 'gethostbyname', 'gethostbyname_ex', 'gethostname', 'getprotobyname', 'getservbyname', 'htonl', 'htons', 'ntohl', 'ntohs', 'socket'] >>> socket.fromfd() method is called in the fcgi._startup() function, which is called in the constructor of FCGI object. Since fcgi._startup() function is catching only socket.error exceptions instead of AttributeError exception the program dumps. If AttributeError except clause is added immediately after the socket.error() in fcgi._startup(): except AttributeError: global _isFCGI _isFCGI = 0 return then the program works fine. Is there something I am doing wrong or is there something wrong with my Python installation? 2) I was wondering whether it is possible to use fcgi.py based programs with Apache using cgi-fcgi brdige. If so, how would one configure cgi-fcgi to know to launch a python interpreter with a specific program to interpret? If there is an example it would be greatly appreciated. Thanks

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tftplib ?
by Gregory Trubetskoy Jan. 2, 2001

Jan. 2, 2001

Before I write my own - is there by a chance a tftplib.py or something that implements tftp in Python out there? Thanks! -- Gregory (Grisha) Trubetskoy grisha(a)ispol.com

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Bug? in os.chown()
by David Lambert Jan. 2, 2001

Jan. 2, 2001

I am running Python 2.0 on Mandrake Linux 7.2 and have come across an apparent anomaly with os.chown(). Running a process as root, I can change any file's ownerships apart from symbolic links. No error is given, but the ownership refuses to be changed. Is this a feature or a bug? How do I change a symbolic link's owner and group? Any help would be greatly appreciated. Dave Lambert.

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Re: split hangs
by davide＠mercurio.localdomain Jan. 1, 2001

Jan. 1, 2001

In comp.lang.python, you wrote: >The tail end of the output is clear: adding another character to the string >doubles the time it takes to figure out that the regexp doesn't match. This >isn't a bug, it's the way Python (and Perl, and Emacs, and ...) regexps >work. A full explanation is quite involved; you can find one in Jonathan >Friedl's excellent book "Mastering Regular Expressions" (O'Reilly). I tried the equivalent regexp in emacs <\([^<>"]+\("[^"]*"\)?\)+> with bigger and bigger files and it does not seem to give an exponential behaviour. In everything I read regexp matching is given as a linear time problem in n + m (where n is the size of the testing string and m the size of the regular expression). I am a python newbye and I could not find the reason for this exp behaviour. The regular expressions seems pretty standard to me, and so there should be no need to go beyond regular languages and DFA. Would you explain why this algorithm is needed in python? Do really the other implementation (grep, perl, emacs, ecc...) use the same algorithm? Thanks, Davide

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Recursive inner function... How?
by Bjorn Pettersen Jan. 1, 2001

Jan. 1, 2001

Ok, this is what I want to do: def outer(): def inner(): inner() inner() outer() i.e. I call outer, outer has an auxiliary sub function called inner that recurses to infinity (that is not the problem). The above gives the expected result that inner is not defined inside inner. Inconvenient, but we know the drill: def outer(): def inner(inner=inner): inner() inner() outer() however, in 2.0 that gives an "UnboundLocalError: Local variable 'inner' referenced before assignment". The following works of course, but is rather repetitive... def outer(): def inner(inner): inner(inner) inner(inner) outer() Please tell me I'm doing something wrong? -- bjorn

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