Steven D'Aprano writes:
> I'm surprised that you think that you should be able to apply
> arbitrary mathematical operations to strings *before* turning them
> into an int and still get sensible results. That boggles my mind.
I think the idea is you should not be able to do mathematical operations
On 09/22/10 02:44, Diez B. Roggisch wrote:
> Antoine Pitrou writes:
>
>> On Tue, 21 Sep 2010 17:59:27 +0200
>> de...@web.de (Diez B. Roggisch) wrote:
>>>
>>> The problems explained are simply outdated and crippled python
>>> versions.
>>>
>>> And to me, a python version installed that has not th
On Sat, 25 Sep 2010 22:08:54 -0700, John Nagle wrote:
> On 9/25/2010 4:45 AM, Thomas Jollans wrote:
>> On Saturday 25 September 2010, it occurred to Yingjie Lan to exclaim:
>>> Hi,
>>>
>>> I noticed that in python3k, multiplying a sequence by a negative
>>> integer is the same as multiplying it by
Python solution follows (earlier one with an error cancelled). All
crossposting removed since crossposting is a standard trolling tactic.
from collections import defaultdict
def collect(xss):
d = defaultdict(list)
for xs in xss:
d[xs[0]].extend(xs[1:])
Hi,
I am trying to perform a user-install of python 2.7 on Ubuntu 10.04, and my
installation is failing.
This sequence of commands reproduces the failure on my system:
$ tar -zxvf Python-2.7.tgz
$ cd Python-2.7/
$ ./configure --prefix=$HOME
$ make
$ ./python Lib/test/test_collections.py
doctest
In PicoLisp:
(mapcar
'((X) (apply conc (cdr X)))
(group List) )
Cheers,
- Alex
--
http://mail.python.org/mailman/listinfo/python-list
On 09/25/2010 09:05 PM, Xah Lee wrote:
here's a interesting toy list processing problem.
I have a list of lists, where each sublist is labelled by
a number. I need to collect together the contents of all sublists
sharing
the same label. So if I have the list
((0 a b) (1 c d) (2 e f) (3 g h) (1
On 9/25/2010 4:45 AM, Thomas Jollans wrote:
On Saturday 25 September 2010, it occurred to Yingjie Lan to exclaim:
Hi,
I noticed that in python3k, multiplying a sequence by a negative integer is
the same as multiplying it by 0, and the result is an empty sequence. It
seems to me that there is a
here's a interesting toy list processing problem.
I have a list of lists, where each sublist is labelled by
a number. I need to collect together the contents of all sublists
sharing
the same label. So if I have the list
((0 a b) (1 c d) (2 e f) (3 g h) (1 i j) (2 k l) (4 m n) (2 o p) (4 q
r) (5 s
Sorry, didn't document my code well enough.
Here is the code with an example.
Yingjie
#Code begins###
from itertools import permutations
def solve(puzzle):
"""solve alphametic puzzles in just 9 lines of code.
Make sure each operator is seperated from the words by
wh
Hi all,
Thanks for considering this proposal seriously and
all your discussions shed light on the pro's and cons
(well, more cons than pros, to be honest).
It occurrs to me that this proposal is not a sound
one, for the reasons already well documented in
this thread, which I need not repeat.
On Sat, 25 Sep 2010 06:54:36 -0700, Yingjie Lan wrote:
> For the rule above, how about the
> case to reverse and multiply:
>
L*-3 #L reversed and repeated three times
>
> v.s.
>
L[::-1]*3 #L reversed and repeated three times
>
> The first one is simpler (4 chars v.s. 9 chars). I thou
On Sat, 25 Sep 2010 13:45:11 +0200, Thomas Jollans wrote:
> On Saturday 25 September 2010, it occurred to Yingjie Lan to exclaim:
>> Hi,
>>
>> I noticed that in python3k, multiplying a sequence by a negative
>> integer is the same as multiplying it by 0, and the result is an empty
>> sequence. It
On Sat, 25 Sep 2010 14:45:29 +0200, Thomas Jollans wrote:
>> The problem with using the loopback interface is that it's still
>> "network access", which can run into all kinds of issues with security
>> policies, firewalls, etc.
>
> What kind of crappy firewall blocks loopback traffic? Really?
T
On Sep 21, 1:30 am, alex23 wrote:
> Bruno Desthuilliers
> wrote:
>
> > alex23 a écrit :
> > > Python only actually executes a module the first time it's imported,
>
> > Beware of multithreading and modules imported under different names...
> > There can be issues with both in some web frameowrks.
On Sep 20, 7:39 am, Bruno Desthuilliers wrote:
> Niklasro a écrit :
>
> > Good to learn what I'm doing :-) since important being able to explain
> > choices taken farther than "doing it because it works".
> > I understand the concept of modules may not correspond to java
> > programming where I co
On 25 Sep, 09:22, Yingjie Lan wrote:
> Hi,
>
> I noticed that in python3k, multiplying a sequence by a negative integer is
> the same as multiplying it by 0, and the result is an empty sequence. It
> seems to me that there is a more meaningful symantics.
>
> Simply put, a sequence multiplied by
Hi Terry,
On 2010-09-25 19:24, Terry Reedy wrote:
> On 9/25/2010 4:22 AM, Yingjie Lan wrote:
> There is already a builtin reversed() function whose output can be
> multiplied.
Seemingly, it can't:
$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)
[GCC 4.4.3] on linux2
Type "help
On Sun, Sep 26, 2010 at 12:32 AM, Jonas Galvez wrote:
> Just installed Python2.7 on my OSX Leopard with make altinstall.
>
> No missing dependencies, but I have one annoying problem: the delete key
> prints '^H' on the Python shell.
>
> Does anyone know how to fix that?
>
> Thanks in advance,
>
I
Just installed Python2.7 on my OSX Leopard with make altinstall.
No missing dependencies, but I have one annoying problem: the delete key
prints '^H' on the Python shell.
Does anyone know how to fix that?
Thanks in advance,
-- Jonas
--
http://mail.python.org/mailman/listinfo/python-list
On 9/25/2010 10:24 AM Terry Reedy said...
On 9/25/2010 4:22 AM, Yingjie Lan wrote:
I noticed that in python3k, multiplying a sequence by a negative
integer is the same as multiplying it by 0, and the result is an
empty sequence.
This is explicitly documented: "Values of n less than 0 are treat
On 9/25/2010 4:22 AM, Yingjie Lan wrote:
Hi,
I noticed that in python3k, multiplying a sequence by a negative
integer is the same as multiplying it by 0, and the result is an
empty sequence.
This is explicitly documented: "Values of n less than 0 are treated as 0
(which yields an empty sequen
On 9/25/2010 3:53 AM, deluxstar wrote:
The traceback is:
2010-09-25 10:50:38+0300 [-] Traceback (most recent call last):
2010-09-25 10:50:38+0300 [-] File "../appsrv/lqcommon.py", line 983,
in getPRMS
2010-09-25 10:50:38+0300 [-] File "/usr/lib/python2.6/inspect.py",
line 931, in getouterfra
Stefan Schwarzer wrote:
> On 2010-09-25 15:54, Yingjie Lan wrote:
>> The first one is simpler (4 chars v.s. 9 chars).
>> I thought it was also intuitive because if you multiply
>> a vector by -1, you should get a vector
>> in the reversed direction. But, intuitiveness depends
>> on who you are, wh
Hi,
On 2010-09-25 15:54, Yingjie Lan wrote:
> The first one is simpler (4 chars v.s. 9 chars).
One thing is whether a certain form is shorter, another
thing to take into account is how often you need the
functionality.
> I thought it was also intuitive because if you multiply
> a vector by -1, y
Hi,
I am teaching Python this semester and
as I am trying to explain the code by
Raymond Hettinger, I need to make it
simpler (this is an introductory course).
And it ends up to be just 9 lines of code.
Just for fun. See also:
http://diveintopython3.org/advanced-iterators.html
Regards,
Yingji
Hi,
>
> In my opinion this _isn't_ a situation where it's good. :)
>
> L[::-1]
>
> is only marginally longer than
>
> -1 * L
>
> I think this small gain doesn't justify "violating" this
> "Python Zen" rule (from `import this`):
>
> There should be one-- and preferably only one
>
Hi,
On 2010-09-25 14:11, Yingjie Lan wrote:
> Having more than one way of doing things sometimes is good.
In my opinion this _isn't_ a situation where it's good. :)
L[::-1]
is only marginally longer than
-1 * L
I think this small gain doesn't justify "violating" this
"Python Zen" rule
On Saturday 25 September 2010, it occurred to Nobody to exclaim:
> On Fri, 24 Sep 2010 19:28:45 +0200, Thomas Jollans wrote:
> > If you're using UNIX, and you don't actually need the stream to be
> > passed via the hard drive (why would you?), but for some reason want to
> > use the file system, lo
On Fri, 24 Sep 2010 19:28:45 +0200, Thomas Jollans wrote:
> If you're using UNIX, and you don't actually need the stream to be
> passed via the hard drive (why would you?), but for some reason want to
> use the file system, look info UNIX/local sockets. But, really, I'm
> guessing that local TCP s
--- On Sat, 9/25/10, Thomas Jollans wrote:
> for every list l and integer n >= 0:
> len(l*n) == len(l)*n
Well, this invariance is indeed broken under my proposal.
But it is *already broken* in current python3k.
However, the following invariance is maintained under
my proposal:
len(l*n) == le
On Saturday 25 September 2010, it occurred to Yingjie Lan to exclaim:
> Hi,
>
> I noticed that in python3k, multiplying a sequence by a negative integer is
> the same as multiplying it by 0, and the result is an empty sequence. It
> seems to me that there is a more meaningful symantics.
Um...
fo
On Saturday 25 September 2010, it occurred to Dsrt Egle to exclaim:
> Thanks for your reply, Ben. Actually I have the paths "C:\Python25;C:
> \Python25\Scripts" in the %PATH% variable, and the %PYTHONPATH% has
> the following:
>
> [...]
>
> Looking at the file C:\Python25\Lib\site-packages\pyflak
On Samstag 25 September 2010, Steven D'Aprano wrote:
> My guess is that you've copied the .pyc file onto the server,
> BUT there is also an older version of the .py file there as
> well. Because the modification date is older than that of the
> .pyc file, Python executes the compiled code from the
On Sat, 25 Sep 2010 00:53:13 -0700, deluxstar wrote:
> The traceback is:
> 2010-09-25 10:50:38+0300 [-] Traceback (most recent call last):
> 2010-09-25 10:50:38+0300 [-] File "../appsrv/lqcommon.py", line 983,
> in getPRMS
> 2010-09-25 10:50:38+0300 [-] File "/usr/lib/python2.6/inspect.py",
>
Hi,
I noticed that in python3k, multiplying a sequence by a negative integer is the
same as multiplying it by 0, and the result is an empty sequence. It seems to
me that there is a more meaningful symantics.
Simply put, a sequence multiplied by -1 can give a reversed sequence.
Then for any
On 24 Eylül, 12:39, Peter Otten <__pete...@web.de> wrote:
> deluxstar wrote:
> > We have an application working on several servers generally written
> > with Python 2.6 and Twisted 10.
> > The source codes are located in one server and compiled in this
> > server. The compiled files are copied to o
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