"Eric Brunel" <[EMAIL PROTECTED]> writes:
> -myScript.py--
> print 'export MY_VARIABLE=value'
> --
>
> -myScript.sh--
> python myScript.py > /tmp/chgvars.sh
> . /tmp/chgvars.sh
I
Ooops, Larry, forgive me being to overhauled here:
Actually self.RS = RS does not make the RS object available in the
module, Steve's method does however.
-Jelle
--
http://mail.python.org/mailman/listinfo/python-list
Lasse Vågsæther Karlsen wrote:
> How about:
>
> list.sort(key=lambda x: x[3])
>
> Does that work?
>
Yes, on my linux-test-box it work, but I my developer pc I don't have
the 2.4 yet. I think that this is a good reason for update :)
Thanks,
Michele
--
http://mail.python.org/mailman/listinfo/py
Peter T. Breuer wrote:
> In comp.os.linux.misc David Schwartz <[EMAIL PROTECTED]> wrote:
>
> > "Peter T. Breuer" <[EMAIL PROTECTED]> wrote in message
> > news:[EMAIL PROTECTED]
>
> >> Not if they abuse a monopoly position in doing so, which is where we
> >> started.
[snip]
> O/ses on PC platforms,
On Oct 20, [EMAIL PROTECTED] wrote:
> I am looking for the best and efficient way to replace the first word
> in a str, like this:
> "aa to become" -> "/aa/ to become"
> I know I can use spilt and than join them
> but I can also use regular expressions
> and I sure there is a lot ways, but I need r
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
> for new style classes __getattribute__ is defined, see eg.
> http://www.python.org/2.2.3/descrintro.html
Steve Holden <[EMAIL PROTECTED]> writes:
> >>> object.__getattribute__
>
>
> Ring any bells?
Yes, of course. Thanks ;-)
Thomas
--
http
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
> I am looking for the best and efficient way to replace the first word
> in a str, like this:
> "aa to become" -> "/aa/ to become"
> I know I can use spilt and than join them
> but I can also use regular expressions
> and I sure there is a lot ways,
i have thought about doing this, just a little different. i was going
to list the value pairs.
take the start time and end time and plot 100 empty plots between them.
add the value pairs, sort by time, and then draw it. The only thing is
it get kinda complicated when the times change a lot. they co
"Mark Line" <[EMAIL PROTECTED]> writes:
> I'm managed to get some code to download a message from the email account
> and save it to a text file, does any one have a link to some sample code to
> search though a file until a string of characters is matched? Or could
> point me to some functions
Is there any code that would allow a person to click a location on the
screen and have that location saved for a future use? For example to imbed a
watermark on an image or text, etc.
S
--
http://mail.python.org/mailman/listinfo/python-list
Thanks Mike that is just what I was looking for, I have looked at
beautifulsoup but it doesn't really do what I want it to do, maybe I'm
just new to python and don't exactly know what it is doing just yet.
However string find woks. Thanks
On Thu, 20 Oct 2005 09:47:37 -0400, Mike Meyer wrote:
> Be
On 2005-10-20, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> i have tried to use unix timestamps,
That has always worked for me. What happened?
> and i have also tried with DateTime objects
Never tried that.
> do i need to use a scale that isn't linear (default in most) ?
No.
> how do i pu
On 2005-10-20, Larry Bates <[EMAIL PROTECTED]> wrote:
> I would try to live with time scale being fixed
I don't understand what you mean by "the time scale being
fixed". It's not. If you just pass the time,value pairs to
gnuplot, it does exactly what it should.
> and insert
> None (or whatever
[Toby Dickenson]
> ...
> ZODB's BTrees work in a similar way but use the regular python comparison
> function, and the lack of a guarantee of a total ordering can be a liability.
> Described here in 2002, but I think same is true today:
> http://mail.zope.org/pipermail/zodb-dev/2002-February/002304
On 2005-10-20, Grant Edwards <[EMAIL PROTECTED]> wrote:
>> and insert None (or whatever value is used by charting
>> package) for times where observations were not taken. This
>> will mean that you have to preprocess your data by determining
>> a time step step value that will fit your data. If
Micah Elliott wrote:
> And the regex is comparatively slow, though I'm not confident this one
> is optimally written:
>
> $ python -mtimeit -s'import re' '
> re.sub(r"^(\w*)", r"/\1/", "a b c")'
> 1 loops, best of 3: 44.1 usec per loop
the above has to look the pattern up in the
[EMAIL PROTECTED] wrote:
> how ?
> i have tried to use unix timestamps, and i have also tried with
> DateTime objects
> do i need to use a scale that isn't linear (default in most) ?
> how do i putt this off ?
Here is some code that works for me. It plots multiple datasets against time.
The input
In comp.os.linux.misc T Beck <[EMAIL PROTECTED]> wrote:
> Peter T. Breuer wrote:
>> In comp.os.linux.misc David Schwartz <[EMAIL PROTECTED]> wrote:
>>
>> > "Peter T. Breuer" <[EMAIL PROTECTED]> wrote in message
>> > news:[EMAIL PROTECTED]
>>
>> >> Not if they abuse a monopoly position in doing so,
ok, yeah, thats exactly what i am looking for. i will give it a go.
thanks a whole lot.
putt this off is a typo, pull this off is what i was meaning to type.
this is cool.
--
http://mail.python.org/mailman/listinfo/python-list
Michele Petrazzo wrote:
> Lasse Vågsæther Karlsen wrote:
>
>> How about:
>>
>> list.sort(key=lambda x: x[3])
Better to use key=operator.itemgetter(3)
> Yes, on my linux-test-box it work, but I my developer pc I don't have
> the 2.4 yet. I think that this is a good reason for update :)
or learn
Hello mates.
I'm part of a big project's developer team. We are writting an
application in Java and we are planning to add scripting functionality
to it. What we exactly are planning is to give a kind of tool that would
allow our users to write their own scripts to perform their special
operat
Hi,
I'm having some problems with basic RE in python. I was wondering
whether
somebody could provide a hint on what's going wrong with the following
script. Comments are included.
TIA.
-myself
> python2.3
Python 2.3.4 (#1, Nov 18 2004, 13:39:30)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-39)] on l
I need to hide the complexity from users to access an information
webpage, which is normally accessible after filling in a web
form with the correct data.
The address of the information webpage is like
https://external.address.com/info.asp?
where is a number generated by the server.
This number
> My teammates and I were talking about to use one of Python, Ruby or
> Groovy. But, we haven't decided which to use.
>
> What seems to be easier is to use Python, you know.. because of the
> Jython thing. But, it is probably a mistake to take Jython without a
> extensive analysis of the all po
[EMAIL PROTECTED] wrote:
> Hi,
>
> I'm having some problems with basic RE in python. I was wondering
> whether
> somebody could provide a hint on what's going wrong with the following
> script. Comments are included.
>
> TIA.
> -myself
>
>
>>python2.3
>
> Python 2.3.4 (#1, Nov 18 2004, 13:39:3
OK, I got it.
- The re module search function syntax is:
search( pattern, string[, flags])
where re.IGNORECASE is a valid flag.
- The RE Object search method syntax is:
search( string[, pos[, endpos]])
where "The optional second parameter pos gives an index in the string
where
Thanks for your help.
-myself
--
http://mail.python.org/mailman/listinfo/python-list
Hi,
I have a class with various class-level variables which are used to
store global state information for all instances of a class. These are
set by a classmethod as in the following (in reality the setcvar method
is more complicated than this!):
class sup(object):
cvar1 = None
cvar
Hi,
I'd like to thank everyone who contributed, especially Richard Brown
from Dartware and Rick Thomas. I'm highly impressed that the smallest
user base of SPE collected the largest donation ever to SPE. Now it's
my turn to impress the SPE Mac users.
As such the light is green for SPE on the Mac.
[EMAIL PROTECTED] a écrit :
>
>
> My solution is sqlstring. A single-purpose library: to create SQL
> statement objects. These objects (such as sqlstring.Select), represent
> complex SQL Statements, but as Python objects. The benefit is that you
> can, at run-time, "build" the statement pythonica
Realy Thanks, I will try this
Hagai
--
http://mail.python.org/mailman/listinfo/python-list
Stewart Midwinter a écrit :
> I've made a comparison of the relative popularity of blogging tools
> used by python programmers. I was surprised by the number of python
> developers not using python for their blogs; isn't that like GM
> employees driving Toyota cars?
>
> See my post at:
>
> http:
Thank you for all the great information and links! I think I will do what a
lot of you reccomended and try both for myself, the only problem is finding
time with homework, college applications, and SATs coming up. I'll let you
know how it turns out. Again, thank you all for the help.
--
http
"Peter T. Breuer" <[EMAIL PROTECTED]> wrote:
>No - they got the deal with IBM when they were a garage startup.
Not quite a garage startup. They had initial success in Albuquerque,
NM, writing a Basic interpreter for the MITS Altair machine. By the
time IBM came to them, they had moved to Seattle
Hi,
There are 2 wxPython application, A and B and need to exchange msg.
Sending WM_CLOSE, wxEVT_MOUSEWHEEL to B is OK, and sending user message
like 1225 from A to B is also OK.
But B didn't catch this message, note, B is running before A sends msg
and can receive "WM_CLOSE".
Do I have to make
Thomas Bellman wrote:
>try:
> os.makedirs("/tmp/trh/spam/norwegian/blue/parrot/cheese")
>except os.error, e:
> if e.errno != errno.EEXIST:
> raise
This is what i want. Thanks.
(the doc needs quite some improvement...)
Xah
[EMAIL PROTECTED]
∑ http://xahlee.org/
-
Hey,
For a bit, I've been trying to create a first person view in Python,
currently using the Soya engine. And while I can make the camera, and
where I want it, how do I link it to controls? So that I can use WASD,
etc. to move the camera?
--
http://mail.python.org/mailman/listinfo/python-list
"Casey Hawthorne" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> What languages do you know already?
>
> What computer science concepts do you know?
>
> What computer programming concepts do you know?
>
>
> Have you heard of Scheme?
>
>
> Ruby is a bit Perl like -- so if you like P
I'm having trouble with something that seems like it should be simple.
I need to copy a file, say "abc-1.tif" to another directory, but if it's
in there already, I need to transfer it named "abc-2.tif" but I'm going
about it all wrong.
Here's what doesn't work: (I'll add the copy stuff from shuti
On Thursday 20 October 2005 22:43, Bell, Kevin wrote:
> I need to copy a file, say "abc-1.tif" to another directory, but if it's
> in there already, I need to transfer it named "abc-2.tif" but I'm going
> about it all wrong.
What a coincidence... I stepped about this today:
http://aspn.activestat
Well, Python, Zope & Plone hosting are quite popular. However python
based blog software isn't as sexy as let's say blogger.
For SPE I first used a combination of PyDS&pycs.net. It is free for
everyone, but unfortunately not stable enough to my standards.
Luckily I got sponsored by zettai.net, wh
I can't seem to get that to work either.
child =
pexpect.spawn('/bin/sh',args=['-c','/usr/bin/ssh','-t','-o','StrictHostKeyChecking
no',host,command,'|','awk','{print %s:$0}'%host], timeout=30)
Complains its getting the wrong arguments to ssh.
Eli
--
http://mail.python.org/mailman/listinfo/pyt
Working with several thousand tagged items on a Tkinter Canvas, I want
to change different configurations of objects having a certain group of
tags.
I've used the sets module, on the tuple returned by Tkinter.Canvas.
find_withtag() method.
Since this method takes only one tag at time, I use it fo
On comp.os.linux.misc, in <[EMAIL PROTECTED]>, "Tim Slattery" wrote:
Three OS's from corporate kings in their towers of glass,
Seven from valley lords where orchards used to grow,
Nine from dotcoms doomed to die,
One from the Dark Lord Gates on his dark throne
In the Land of Redmond where the
Ouppsss!
the title should have read:Set operation for tuples...
(sigh!)
--
http://mail.python.org/mailman/listinfo/python-list
Is it just me or do the server_close() methods do squat? I'm primarily
working with a ThreadingTCPServer object and trying to create a simple
server that can shut itself down. But even simplest cases don't seem
to work.
Admittedly I am trying it from within my handler class, but for some
odd rea
Andrew Jaffe wrote:
> Hi,
>
> I have a class with various class-level variables which are used to
> store global state information for all instances of a class. These are
> set by a classmethod as in the following (in reality the setcvar method
> is more complicated than this!):
>
> class sup(
On Thu, 20 Oct 2005, [EMAIL PROTECTED] wrote:
> On this line of thought, what about the += operator? That might be more
> intuative than //. I could even use -= for not in.
You're going to have to explain to me how using an assignment operator for
something other than assignment is intuitive!
On Thu, 20 Oct 2005, Pierre Quentel wrote:
[EMAIL PROTECTED] a écrit :
My solution is sqlstring. A single-purpose library: to create SQL
statement objects.
With the same starting point - I don't like writing SQL strings inside Python
code either - I have tested a different approach : use th
On Thu, 20 Oct 2005, Diez B. Roggisch wrote:
> So - _I_ think the better user-experience comes froma well-working easy
> to use REPL to quickly give the scripts a try.
I'd agree with that. Which is better, a difficult language with lots of
fancy tools to help you write it, or an easy language?
Hi All -
I am working on a project that requires Python be installed on multiple
Windows servers. I was wondering if anyone knew of a
method/utility/script that can push the installation of Python to
multiple networked servers from a centralized location.
Thanks in advance!
-shawn
begin:vc
What's the easiest and quickest way to execute a compiled C "command
line interface" program THROUGH Python?
--
http://mail.python.org/mailman/listinfo/python-list
[EMAIL PROTECTED] wrote:
> Working with several thousand tagged items on a Tkinter Canvas, I want
> to change different configurations of objects having a certain group of
> tags.
>
> I've used the sets module, on the tuple returned by Tkinter.Canvas.
> find_withtag() method.
>
> Since this metho
Ernesto wrote:
> What's the easiest and quickest way to execute a compiled C "command
> line interface" program THROUGH Python?
I don't know what you mean by THROUGH. But the subprocess, popen2 and
os-modules deal with calling other programs. Try them in that order.
Diez
--
http://mail.python.o
You might also consider Firedrop2, (see
http://www.voidspace.org.uk/python/weblog/arch_d7_2005_10_15.shtml#e119
) , a client side blog creation and content management system created
by Hans Nowak and now being enhnaced and maintained by Michael Foord.
Its very pythonic and extensable.
Ron Stephens
"Steven D'Aprano" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Thu, 20 Oct 2005 13:17:14 +, axel wrote:
>
>> Employees have *no* obligations towards the shareholders of a company.
>> They are not employed or paid by the shareholders, they are employed
>> by the company its
I found this book at my local Border's this week. It appears to be a
most excellent book. I own and have read Magnus' earlier book "Pactical
Python" (which was excellent) but this one is even better. The first
half of the book covers the language, and then the second half goes
into depth developing
Tamas Nepusz wrote:
> Hi everyone,
>
> I have tried to do some googling before asking my question here, but I
> haven't found any suitable answer. I am developing a Python API for a
> graph library written in pure C. The library is doing an awful lot of
> math computations, and some of them can ta
On Thu, 20 Oct 2005, Amol Vaidya wrote:
> "Casey Hawthorne" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
>
>> What languages do you know already? What computer science concepts do
>> you know? What computer programming concepts do you know? Have you
>> heard of Scheme?
Good que
No, that's actually a bit more complicated. The library I'm working on
is designed for performing calculations on large-scale graphs (~1
nodes and edges). I want to create a Python interface for that library,
so what I want to accomplish is that I could just type "from igraph
import *" in a Pyt
Hi,
(I am _very_ new to web programming)
I am writing a client module (browser plugin) and server module (Python CGI)
that need to exchange information.
I want the transaction to be intiated when the client accesses the link.
I need data to go back and forth between the client and the server (c
Dear Stani,
It is good to hear that the donation was a success. And you deserve it,
your contribution to the Python community is an example fot others and
I am convinced that every donation, be it large or small, is well spent!
A lot of us use SPE, don't we?
greetz,
DimitriOn 20 Oct 2005 12:38:04
So, it turns out that reload() fails if the module being reloaded isn't
in sys.path.
Maybe it could fall back to module.__file__ if the module isn't found
in sys.path??
... or reload could just take an optional path parameter...
Or perhaps I'm the only one who thinks this is silly:
>>> my_module
Tom Anderson wrote:
> On Thu, 20 Oct 2005, [EMAIL PROTECTED] wrote:
>
> > On this line of thought, what about the += operator? That might be more
> > intuative than //. I could even use -= for not in.
>
> You're going to have to explain to me how using an assignment operator for
> something othe
> person ** (
> (person.type_id == 'customer')
> & (person.id %= phone(phone.person_id)))
> )
>
Nevermind. This doesn't work because all of the X= operators in
question are assignment operators, and therefore generate a Syntax
Error if in a nested expression. I think I've settled on just doin
Lonnie Princehouse wrote:
> So, it turns out that reload() fails if the module being reloaded isn't
> in sys.path.
>
> Maybe it could fall back to module.__file__ if the module isn't found
> in sys.path??
> ... or reload could just take an optional path parameter...
>
> Or perhaps I'm the only on
I don't think you really need to give to much time in weighting between
python or Ruby. Both are fine. But Python has the obvious advantage
that it has much more modules than Ruby so many things you don't need
to implement if you have real work to do.
I recommend you give haskell a shot if you are
I think you're mistaken about how 'sh -c' works. The next argument after "-c"
is
the script, and following arguments are the positional arguments. (what, you've
never used -c in conjunction with positional arguments? me either!)
Example:
-
On Wed, Oct 19, 2005 at 09:26:16AM -0700, Dr. Who wrote:
> The fact that the directory already exists is irrelevant to the function...it
> still failed to create the directory.
That's not true. Imagine that os.makedirs() is used inside tempfile.mkdtemp()
(I looked, and it isn't) and the proposed
I'm trying to create a dbm database with around 4.5 million entries but the
existing dbm modules
(dbhash, gdbm) don't seem to cut it. What happens is that the more entries are
added, the more time
per new entry is required, so the complexity seems to be much worse than
linear. Is this to be
expe
"Mike Schilling" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> An employee who refuses to act as directed, claiming that he's thinking of
> the shareholders' interests, can be fired for cause. His only recourse
> would be to become a shareholder (not hard), and then get the at
I have a class that is a windows in a GUI
the following is the code:
class optWin:
def __init__(self):
return None
def __call__(self):
self.root = tk()
self.root.title("My title")
self.root.mainloop()
return None
1)Why doesn't this work when I go
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
> I am not sure your intention but I think there isn't a one language
> fits all situation here.
Very true.
> C/C++ - for linux kernel hacking etc., many library out there still use
> it
> python - generic stuff
> SQL - nothing beats it for many bus
import subprocess
subprocess.call("cmd")
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http://mail.python.org/mailman/listinfo/python-list
optWin() will create a callable object which is an instance of the class
optWin. Calling this callable object will call the __call__() method with the
behavior you anticipate. You also need to import Tk from Tkinter and call Tk
"Tk" and not "tk".
Meditate on the following :
from Tkinter impor
Forgot to answer the "better" part:
class optFrame(Frame):
def __init__(self, *args, **kwargs):
Frame.__init__(self, *args, **kwargs)
self.pack()
self.make_widgets()
def make_widgets(self):
"""
Put widgets here.
"""
pass
def main():
tk = Tk()
opt
Hello!
given the definition
def f(a,b): return a+b
With this code:
fs = [ lambda x: f(x,o) for o in [0,1,2]]
or this
fs = []
for o in [0,1,2]:
fs.append( lambda x: f(x,o) )
I'd expect that fs contains partial evaluated functions, i.e.
fs[0](0) == 0
fs[1](0) == 1
fs[2](0) == 2
But this
Juan Pablo Romero wrote:
> Hello!
>
> given the definition
>
> def f(a,b): return a+b
>
> With this code:
>
> fs = [ lambda x: f(x,o) for o in [0,1,2]]
>
> or this
>
> fs = []
> for o in [0,1,2]:
> fs.append( lambda x: f(x,o) )
>
> I'd expect that fs contains partial evaluated functions,
You are asking it to return a list of lambda, not its evaluated value.
map(lambda x: f(x,0), [0,1,2]) works.
[ f(o) for o in [0,1,2] ] works too.
Juan Pablo Romero wrote:
> Hello!
>
> given the definition
>
> def f(a,b): return a+b
>
> With this code:
>
> fs = [ lambda x: f(x,o) for o in [0,1,
Robert Kern <[EMAIL PROTECTED]> writes:
> Juan Pablo Romero wrote:
>> Hello!
>>
>> given the definition
>>
>> def f(a,b): return a+b
>>
>> With this code:
>>
>> fs = [ lambda x: f(x,o) for o in [0,1,2]]
>>
>> or this
>>
>> fs = []
>> for o in [0,1,2]:
>> fs.append( lambda x: f(x,o) )
>>
thank you very much,
I have one more question that is tk related, I've use tkfileopendialog
or whatever that name is to select files is there also a dialog for
creating files, well not really creating them but allowing the same
look and feel as many porgrams give for saving files? is there also
Quoth "Tamas Nepusz" <[EMAIL PROTECTED]>:
| No, that's actually a bit more complicated. The library I'm working on
| is designed for performing calculations on large-scale graphs (~1
| nodes and edges). I want to create a Python interface for that library,
| so what I want to accomplish is that
I needed to set Entity Parsing, such as
parser.SetParamEntityParsing( expat.XML_PARAM_ENTITY_PARSING_ALWAYS )
--
http://mail.python.org/mailman/listinfo/python-list
"Mark Delon" <[EMAIL PROTECTED]> wrote:
>
>i want to log via python script to https page:
>
>'https://brokerjet.ecetra.com/at/'
>#
>But it does not work.
>
>I am using following code(see below)
>
>Has somebody any ideas?
>How can I get to this https page?
>Need I to know some infos from "provider"(
Sorry for the confusion, I think my example was unclear. Thank you Mike
for this piece of code who solves a part of my problem. In fact, the
sequences are unknown at the beginning, so the first part of the code
has to find possible sequences and if those sequences are repeated,
counts how many time
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
>
>An Example:
>
import sqlstring
model = sqlstring.TableFactory()
print model.person
>SELECT
>person.*
>FROM
>[person] person
The [bracket] syntax is unique to Microsoft. Everyone else, including
Microsoft SQL Server, uses "double quo
"dcrespo" <[EMAIL PROTECTED]> wrote:
>
>Can someone give me lights on how can I deal with dlls from python?
>
>My main purpose is to get access to a Unitech PT600 Bar Code system. I
>have the dll that works fine through Visual Basic. But I'm migrating to
>Python, so I need a way to use the same dll
Title: RE: sqlstring -- a library to build a SELECT statement
Tim Roberts wrote:
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> >
> >An Example:
> >
> import sqlstring
> model = sqlstring.TableFactory()
> print model.person
> >SELECT
> >person.*
> >FROM
> >[person] person
>
>
"Samantha" <[EMAIL PROTECTED]> wrote:
>
>Is there any code that would allow a person to click a location on the
>screen and have that location saved for a future use? For example to imbed a
>watermark on an image or text, etc.
Getting the point is easy. If you are using wxPython, your EVT_LEFT_
It looks like there isn't a last word of the differrences
--
http://mail.python.org/mailman/listinfo/python-list
I cannot quite understand when the third index is a negative
number,like this:
a = '0123456789'
a[1:10:2] I know the index step is 2, so it will collect items from
offset 1, 3, 5, 7, 9
but when a negative number come,like:
a[1::-1] answer '10', and a[1:10:-1] only answer '',
what is the different b
Lonnie Princehouse wrote:
> Maybe it could fall back to module.__file__ if the module isn't found
> in sys.path??
> ... or reload could just take an optional path parameter...
>
> Or perhaps I'm the only one who thinks this is silly:
>
> >>> my_module = imp.load_module(module_name,
> >>> *imp.fin
> Andrew Jaffe wrote:
>
>> Hi,
>>
>> I have a class with various class-level variables which are used to
>> store global state information for all instances of a class. These are
>> set by a classmethod as in the following
>>
>> class sup(object):
>> cvar1 = None
>> cvar2 = None
>>
>>
someone wrote:
> I cannot quite understand when the third index is a negative
> number,like this:
> a = '0123456789'
> a[1:10:2] I know the index step is 2, so it will collect items from
> offset 1, 3, 5, 7, 9
> but when a negative number come,like:
> a[1::-1] answer '10', and a[1:10:-1] only answ
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