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

Intellisense and the psychology of typing
by andrew.queisser＠hp.com June 1, 2005

June 1, 2005

Yesterday I typed in some C++ code that called a function with two ints. Intellisense (auto-complete) helpfully told me that the first formal parameter was called "frontLight" and the second "ringLight". It occurred to me that I'm getting some semantic help here on top of the obvious type safety. It seems to me that the existance of this kind of support is tied to the static typing nature of C++. I've always been interested in the psychology behind those heated "static" vs. "dynamic" (quotes to avoid another lengthy discussion about manifest, latent, explicit, ...) typing debates. So I googled "Intellisense static dynamic typing" and tried to get a view of the collective mental landscape of this subject. It appears that the threads that talk about Intellisense soon run dry. I'm wondering if this is because: 1) Intellisense is really just another crutch that does more harm than good? There were a few hardcore defenders of this position but not many. 2) Intellisense is really useful but hard to implement well in IDEs for dynamic languages? Can anyone comment on the status of Intellisense-like tools for dynamic-language IDEs? 3) Users of dynamic languages are always developing/debugging running programs where the current type of a variable is known and hence Intellisense is possible again? My own limited experience with dynamic languages (Ruby) is limited to edit-run cycles. Any opinions? Thanks, Andrew

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Re: Stupid Newbie Question Concerning CGI and Reading Forward Slashes
by Joey C. June 1, 2005

June 1, 2005

Steve Holden wrote: > It's not a common question, but it's relatively easily answered. You are > splitting everything but the filename off with os.path.split and then > complaining about the result! Once you stop doing that your problem is > solved. Thus, it's a stupid newbie question. Thanks a lot for your help. It seems I was just being plain stupid.

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Re: Encryption with Python?
by Christos TZOTZIOY Georgiou June 1, 2005

June 1, 2005

On Tue, 24 May 2005 10:16:15 +0200, rumours say that "Anthra Norell" <anthra.norell(a)tiscalinet.ch> might have written: >Why whack someone over the head who tries to develop an idea of his own. >Such an approach isn't uncommon to earn extra credit in educational >settings. I would never whack someone over the head (WSOTH) who tries to develop an idea of his own, and never will (intentionally at least --I myself like reinventing the wheel once in a while just to make sure my synapses still work). However I do WSOTH for >>I rolled my own for relatively short sequences, like passwords. The key is >>an integer. To decrypt use the negative encryption key. I consider the >>encryption unbreakable, as it is indistinguishable from a random sequence. So, to be clear, my reason was your declaring that "I consider the encryption unbreakable, as it...", and that is why I actually challenged you to either support the unbreakability of your algorithm by supplying sensitive data for you, or back off and simply say "ok guys, my words were a *little* over the top". That's all. I see you took up the challenge and indirectly replied to my last question, and in good spirit I say you earned a little respect from me, at least for standing up to your words. Now I hope no-one gives a try to your data (for your own sake :) -- TZOTZIOY, I speak England very best. "Be strict when sending and tolerant when receiving." (from RFC1958) I really should keep that in mind when talking with people, actually...

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working with pointers
by Michael June 1, 2005

June 1, 2005

Do expicit pointers exist in python?? if i do: a = [5,7] b = a a.empty() b = ? how do i do explicit pointers?? Mike

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DLL load failed: The specified procedure could not be found
by Bill Davy June 1, 2005

June 1, 2005

sys.path: H:\Husky\HostPC\V1\SHIP\Debug H:\Husky\HostPC\V1\SHIP E:\Bill\Python-2.4.1\PCbuild\python24_d.zip C:\Python24\Lib C:\Python24\DLLs C:\Python24\Lib\lib-tk H:\Husky\HostPC\V1\RunSHIP H:\Husky\HostPC\V1\Debug C:\Python24 C:\Python24\lib\site-packages Traceback (most recent call last): File "H:\Husky\HostPC\V1\SHIP\test1.py", line 7, in ? import SHIP File "H:\Husky\HostPC\V1\Debug\SHIP.py", line 5, in ? import _SHIP ImportError: DLL load failed: The specified procedure could not be found. a) What "specified procedure " b) SHIP was made by SWIG c) Is there some way to find out which DLL and which procedure is involved? It's all debug build, sys.path has all the Debug directories. tia Bill

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running tkinter
by Jim Anderson June 1, 2005

June 1, 2005

I have just installed Fedora Core 3 on my pc. Python runs fine, but when I try to run tkinter the tkinter library is not found. I tried installing python 2.4.1 and could not get tkinter to run there either. When I look through the build directories for 2.4.1, I find a lib-tk, but I do not find anything for tcl. In past releases, my recollection is that tcl/tk were part of the release and that if TCL_LIBRARY and TK_LIBRARY environment variables were set right, then tkinter would work. Are tcl/tk still supposed to be an intergrated part of the python release? Do I have to download, configure, make, install tcl and tk packages to get tkinter running? Thanks for any suggestions in advance. Jim Anderson

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Incrementing letters
by Michael June 1, 2005

June 1, 2005

Hi, I've got a string s, and i want to shift all the letters up by one, eg a->b, b->c ........ z->a In c++ i can do this quite simply with if(C == 'z') C='a'; else C++; but i can't work out how to do this this in python?? Regards Michael

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Swig compile errors
by superprad＠gmail.com June 1, 2005

June 1, 2005

Hi I am trying to write a python wrapper for a C code I have using swig. when i try to compile the _wrap.c i get a bunch of these warnings and errors can anyone help Steps I followed : $swig -python test_hk.c this generates test_hk.py and test_hk_wrap.c then i compile it as $gcc -Wall -std=c99 test_hk.c test_hk_wrap.c -I/usr/include/python2.3/ /usr/lib/gcc-lib/i486-linux/3.3.5/../../../crt1.o(.text+0x18): In function `_start': ../sysdeps/i386/elf/start.S:98: undefined reference to `main' /tmp/ccayOWVb.o(.text+0xb6f): In function `PySwigObject_repr': : undefined reference to `PyString_FromFormat' /tmp/ccayOWVb.o(.text+0xbe1): In function `PySwigObject_str': : undefined reference to `PyString_FromString' /tmp/ccayOWVb.o(.text+0xc22): In function `PySwigObject_long': : undefined reference to `PyLong_FromUnsignedLong' /tmp/ccayOWVb.o(.text+0xc87): In function `PySwigObject_oct': : undefined reference to `PyOS_snprintf' and a bunch of them.............. : undefined reference to `PyModule_GetDict' collect2: ld returned 1 exit status do I have to include any libraries or whats it that I am missing.

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Re: The need to put "self" in every method
by John Machin June 1, 2005

June 1, 2005

Simon Brunning wrote: > On 31 May 2005 08:45:45 -0700, Fernando M. > <fernandomirandamuro(a)gmail.com> wrote: > >>i was just wondering about the need to put "self" as the first >>parameter in every method a class has because, if it's always needed, >>why the obligation to write it? > > > It doesn't need to be 'self'. You could use 'this', or 's', or whatever. > > Of course, if you *don't* use 'self', you should expect an angly mob > with pitchforks and torches outside your castle. > Wouldn't an angly mob be carrying fishing rods?

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Problem with re.match - Newbie needs some advice
by rh0dium June 1, 2005

June 1, 2005

Hi all, I am having a problem with the method cpuNum. Basically I look to see if the "flag" for "ht" is enabled. If it is the total processors should be cpucount/2. It's not working. I can't seem to get into the second re.match. Can someone point out my apparent error? class Sysinfo: def __init__(self, cpuinfo="/proc/cpuinfo", meminfo="/proc/meminfo"): cpustat = open(cpuinfo) self.cpudata = cpustat.readlines() cpustat.close() def cpuNum(self): cpucount=0 ht=0 for line in self.cpudata: # Remove the newlines.. line=line.strip() if re.match(r"^processor\s+:", line): cpucount += 1 if re.match(r"^flags\s+:", line): flags=re.split(r":\s",line) #print "Found flags", flags[1] if re.match(r"\bht\b",flags[1]): print "HT on" ht=1 if ht: return cpucount/2 else: return cpucount s = Sysinfo( cpuinfo="cpuinfo.1", meminfo="meminfo.1" ) print s.cpuNum() ---- cpuinfo.1 (abbreviated) ---- processor : 0 flags : cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid processor : 1 flags : cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid

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