An interesting archive article on the topic of correctness, and the
layers thereof:
Program verification: the very idea;
Communications of the ACM
Volume 31 , Issue 9 (September 1988)
Pages: 1048 - 1063
Year of Publication: 1988
ISSN:0001-0782
"The notion of program verificatio
I am creating an application which has it's code split between python
and C. The Python is used to provide a high level GUI interface and
the C is for low level functions. I use SWIG to create Python Bindings
for the C functions. I want to implement a feature where there is a
button in the toolbar
I'm looking for something to monitor & download yahoo group messages
using Python, similar to the Perl module WWW::Yahoo::Groups.
I've seen a few comments (speculations?) that Yahoo groups uses Python
code, but couldn't find any examples of samples of such access tools.
Any references or pointers
On Aug 14, 3:39 pm, Christian Heimes wrote:
> guthrie schrieb:
>
>
>
> > I want to do some rrd in a python cgi script, but am having trouble
> > getting an easy install module.
>
> > py-rrdTool looks good, but is distributed in c source, and is missing
> >
h': No such file or directory
error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN
\cl.exe"' failed with exit status 2
C:\Documents and Settings\guthrie\Desktop\py-rrdtool-0.2.1>
--
http://mail.python.org/mailman/listinfo/python-list
I want to have a program which will form a list of all *.py scripts in
a sub-directory, and then call some standard messages on them. So I
can add a new data source modularly by just dropping a new file into
the sources directory with the appropriate methods in it.
For example:
path = sys.path[0]
On Jun 18, 11:28 pm, greg wrote:
> nn wrote:
> > This is certainly an odd one. This code works fine under 2.6 but fails
> > in Python 3.1.
>
> class x:
>
> > ... lst=[2]
> > ... gen=[lst.index(e) for e in lst]
>
> In 3.x it was decided that the loop variables in a list
> comprehension
On Jun 17, 6:38 pm, Steven Samuel Cole
wrote:
> Still don't really understand why my initial code didn't work, though...
Your code certainly looks reasonable, and looks to me like it "should"
work. The comment of partial namespace is interesting, but
unconvincing (to me) - but I am not a Python e
Many thanks to all; perfect solution!
--
http://mail.python.org/mailman/listinfo/python-list
I want to do a functional like pattern match to get teh first two
elements, and then the rest of an array return value.
For example, assume that perms(x) returns a list of values, and I want
to do this:
seq=perms(x)
a = seq[0]
b = seq[1]
rest = seq[2:]
Of course I can shorten to:
Very helpful, thanks!!
So I see that it parses as:
m='1'
a="asdf"
b="1234"
print [((m in a) or b) for m in '%d'%1234 ]
I get it.
Thanks,
Greg
"Duncan Booth" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Gre
Sorry for a simple question- but I don't understand how to parse this use of
a list comprehension.
The "or" clauses are odd to me.
It also seems like it is being overly clever (?) in using a lc expression as
a for loop to drive the recursion.
Thanks for any insight!
Gregory
---
Larry Bates wrote:
> First things first:
>
> Don't name a variable "dict" because if you do it shadows
> the built in dict function (same goes for list, str, ...).
> This WILL bite you later, so start now by not naming
> variables by any built in names.
-- Thanks, got it!
>
> Now to your quest
I'm pretty new to Python, and trying to parse the grammar.
Q: What is the scope of the testlist in a list_for?
For example;
Instead of;
for x in [ x in dict if dict[x]=="thing" ]:
in this:
for x in dict and dict[x]=="thing":
x is undefined.
And why doesn't this work:
for x in
Thanks all!!
-
guthrie wrote:
> Beginner question! :-)
>
> x=[1,2,3,4]
> for i in range(len(x)):
>print x[:-i]
>
> >>> []
> >>> [1,2,3]
> >>> [1,2]
> >>> [1]
>
> 1) The x[:-0] result seems in
Beginner question! :-)
x=[1,2,3,4]
for i in range(len(x)):
print x[:-i]
>>> []
>>> [1,2,3]
>>> [1,2]
>>> [1]
1) The x[:-0] result seems inconsistent to me;
I get the idea that -0=0, so it is taken as x[:0] -> []
2) how then should one do this basic left-recursive subsetting (easily)
top of the library.
Anyway, I get your point, thanks.
Greg
Steven Bethard wrote:
> guthrie wrote:
>
>> Steven Bethard wrote:
>>
>>> Why would ``x.len()`` be any more convenient than ``len(x)``? Your
>>> preference here seems pretty arbitrary.
>>
Many thanks; great information.
Best,
Gregory
Steven Bethard wrote:
> guthrie wrote:
>
>> Steven Bethard wrote:
>>
>>> Why would ``x.len()`` be any more convenient than ``len(x)``? Your
>>> preference here seems pretty arbitrary.
>>
>> -- Per
Steven Bethard wrote:
> Gregory Guthrie wrote:
>
>> For example,
>>- why is len() not a member function of strings? Instead one says
>> len(w).
>
> Why would ``x.len()`` be any more convenient than ``len(x)``? Your
> preference here seems pretty arbi
I am comparing Python to a few other scripting languages, and used a simple
anagrams program as a sample.
I was surprised ast a few python features that did not work as I would
expect/wish; which caused less compact/expressive program styles that I
wanted - reverting to a FORTRAN like series of
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