-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Dear Sphinx users, dear Python community,
unfortunately, it has turned out that at the moment I don't have enough
spare time to fulfill my duties as Python core developer and release
manager, as well as fully maintain my other open-source projects.
On Sun, Oct 28, 2012 at 10:40 PM, farrellpolym...@gmail.com wrote:
I've learned a lot about Ubuntu just trying to install numpy for Python
3.2.3. I've finally managed to put it in the Python3.2 directory but when I
try to import it, I still get there's no module named numpy. There are
On 10/28/2012 09:09 PM, Michael Schumacher wrote:
Von: Donald Miller damill...@gmail.com
Can't directly save to jpg, so exported.
Export to jpg made png. Same for psd.
Shouldn't name track chosen format, so no manual override needed?
Maybe you had set the file-type chooser to this format?
The
On Sunday, October 28, 2012 9:26:01 PM UTC-7, Ian wrote:
On Sun, Oct 28, 2012 at 10:00 PM, Andrew wrote:
Hi Ian,
Well, no it really isn't equivalent.
Consider a programmer who writes:
xrange(-4,3) *wants* [-4,-3,-2,-1,0,1,2]
That is the idea of a range; for what reason
On Sunday, October 28, 2012 10:14:03 PM UTC-7, Paul Rubin wrote:
Andrew writes:
So: Why does python choose to convert them to positive indexes, and
have slice operate differently than xrange
There was a thread a few years back, I think started by Bryan Olson,
that made the case
On Mon, Oct 29, 2012 at 12:54 AM, Andrew andrewr3m...@gmail.com wrote:
On Sunday, October 28, 2012 9:26:01 PM UTC-7, Ian wrote:
On Sun, Oct 28, 2012 at 10:00 PM, Andrew wrote:
snip
The slice class when passed to __getitem__() was created to merely pass two
numbers and a stride to
On Sunday, October 28, 2012 9:44:56 PM UTC-7, alex23 wrote:
On Oct 29, 2:09 pm, Andrew andrewr3m...@gmail.com wrote:
I use this arbitrary range code *often* so I need a general purpose
solution.
I looked up slice() but the help is of no use, I don't even know how I might
overload
On Mon, Oct 29, 2012 at 1:08 AM, andrewr3m...@gmail.com wrote:
On Sunday, October 28, 2012 10:14:03 PM UTC-7, Paul Rubin wrote:
Andrew writes:
snip
I'm getting very frustrated with the editor provided for this group... It
keeps posting prematurely, and putting my email in even when I tell it
On Mon, Oct 29, 2012 at 1:24 AM, andrewr3m...@gmail.com wrote:
On Sunday, October 28, 2012 9:44:56 PM UTC-7, alex23 wrote:
On Oct 29, 2:09 pm, Andrew andrewr3m...@gmail.com wrote:
snip
class RangedSlicer(list):
snip
Then wrap your lists with your RangedSlicer class as needed.
Hmmm...
On Monday, October 29, 2012 1:38:04 AM UTC-7, Chris Rebert wrote:
On Mon, Oct 29, 2012 at 1:24 AM,
On Sunday, October 28, 2012 9:44:56 PM UTC-7, alex23 wrote:
On Oct 29, 2:09 pm, Andrew wrote:
You never wrapped `a` in a RangedSlicer or otherwise made use of RangedSlicer!
You
On 29/10/2012 08:59, andrewr3m...@gmail.com wrote:
Note: I subscribed to the python-list, and am able to recieve e-mails, but I
don't see how to write a post for this particular thread nor subscribe to this
particular thread...
A brief suggestion, or link to a howto would be *much*
Ok, hopefully this is better. I love my own e-mail editor...
I can see that the slice() function can pass in arbitrary arguments.
I'm not sure for lists, which is what the range is applied to, why an
argument like a would be part of a slice.
I *really* don't see what the advantage of a slice
On 29/10/2012 02:31, Andrew Robinson wrote:
Ok, hopefully this is better. I love my own e-mail editor...
I can see that the slice() function can pass in arbitrary arguments.
I'm not sure for lists, which is what the range is applied to, why an
argument like a would be part of a slice.
I
On Mon, 29 Oct 2012 01:59:06 -0700, andrewr3mail wrote:
Note: I subscribed to the python-list, and am able to recieve e-mails,
but I don't see how to write a post for this particular thread nor
subscribe to this particular thread...
The beauty of email is that you don't have to subscribe to a
Am 29.10.2012 00:30, schrieb goldtech:
class Contact:
all_contacts = []
def __init__(self, name, email):
self.name = name
self.email = email
Contact.all_contacts.append(self)
Okay, a class that automatically registers all instances in a central list.
OK,
On Mon, 29 Oct 2012 00:54:29 -0700, Andrew wrote:
Actually, I said in the OP:
I also don't understand why slice() is not equivalent to an iterator,
but can replace an integer in __getitem__() whereas xrange() can't.
Slices and iterators have different purposes and therefore have not been
On Mon, Oct 29, 2012 at 10:19 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
In 'C', where Python is written,
That's a popular misapprehension. Python is written in Java, or Lisp, or
Haskell, or CLR (dot Net), or RPython, or Ocaml, or Parrot. Each of those
languages have, or
Hi all,
I haven't quite figured out how to apply a paid ssl cert, say RapidSSL free SSL
test from Python's recent sponsor sslmatrix.com and what to do with that to
make Python happy.
This good fellow suggests using the PEM format. I tried and failed.
On 10/29/2012 04:32 AM, Chris Angelico wrote:
I wonder if what the OP is looking for is not slicing, but something
more akin to map. Start with a large object and an iterator that
produces keys, and create an iterator/list of their corresponding
values. Something like: a=[1,2,3,4,5,6,7,8,9,10]
On 2012-10-28, Devin Jeanpierre jeanpierr...@gmail.com wrote:
The 'canonical way'
while True:
line = complex_expression
if not line:
break
do_something_with(line)
avoids this problem, but I was never really convinced about the beauty /
readbility of this construct.
Hello all,
I am very new to python. I am currently porting a little project of mine from
java to python and I need to be able to construct and write png images. I
naturally turned myself toward pypng to accomplish this.
I learned from the net that pypng 0.0.13 is supposed to work in Python 3.x
Hi,
is there a way building an OrderedDict faster?
Thanks in advance
Christian
@timeit
def ordered(n=10):
d = OrderedDict()
for i in xrange(n):
d['key'+str(i)] = i
return d
@timeit
def comprehension(n=10):
d = { 'key'+str(i):i for i in xrange(n) }
return d
On Mon, Oct 29, 2012 at 3:52 PM, Andrew Robinson
andr...@r3dsolutions.com wrote:
I am curious as to how quickly it constructs the result compared to a slice
operation.
Eg:
a[1:5]
vs.
[ a[i] for i in xrange[1:5] ]
For the most part, don't concern yourself with performance. Go with
thank you guys for the huge list of answers,
In my setting I have to access some routers and firewall from a
linux-client.
I think I'll try Fabric.
On 26.10.2012 06:20, Rodrick Brown wrote:
On Oct 25, 2012, at 6:34 AM, Schneider j...@globe.de wrote:
Hi Folkz,
how can i create a
Am Donnerstag, 25. Oktober 2012 12:31:46 UTC+2 schrieb Schneider:
Hi Folkz,
how can i create a SSH-Connection with python? I have to send some
commands to the remote host and parse their answers.
greatz Johannes
There is a module in chilkat.
On 10/29/2012 04:19 AM, Steven D'Aprano wrote:
On Mon, 29 Oct 2012 00:54:29 -0700, Andrew wrote:
Slices and iterators have different purposes and therefore have not been
made interchangeable. Yes, there are certain similarities between a slice
and xrange, but there are also significant
In article mailman.2977.1351455364.27098.python-l...@python.org,
Gelonida N gelon...@gmail.com wrote:
The sh module looks intersting, but it's not supported for Windows
platforms.
The X module looks interesting but it's not supported for Windows is
true for many values of X. It's all part
On 10/29/2012 05:23 AM, icgwh wrote:
Hello all,
I am very new to python. I am currently porting a little project of mine from
java to python and I need to be able to construct and write png images. I
naturally turned myself toward pypng to accomplish this.
I don't know if this will help,
I probably should have mentioned that I'm under W7 ultimate x64, I'm using
eclipse Juno (latest) and pydev 2.7.1
--
http://mail.python.org/mailman/listinfo/python-list
That's very kind of you but I don't think it would be particularly fitted to my
needs. The program I'm trying to code creates an image as an 2D array of
pixels which is defined by RGBA value. My program needs to access and
modifies every component of every pixels in the image following a set of
On Sun, Oct 28, 2012 at 10:15 AM, Joshua Landau
joshua.landau...@gmail.com wrote:
I feel necessity to argue against this point.
It is a common thing to stereotype teens in this way - but, being teen
myself, I feel one should try to avoid it. It's painful to watch every time
someone claims he
On Sunday 28 October 2012 16:45:12 GangGreene did opine:
On Sun, 28 Oct 2012 16:29:07 +, Mark Lawrence wrote:
On 13/10/2012 18:49, Santosh Kumar wrote:
Try your local garden centre.
I inquired at the local garden centre, Just got strange looks
Are you sure that is the
On Mon, Oct 29, 2012 at 5:01 PM, Andrew Robinson
andr...@r3dsolutions.com wrote:
Looking at some of the online programming notes -- a slice apparently
doesn't use an integer storage variable that is capable of arbitrary
expansion. =-O -- and hence, won't work for very large sized lists. That
In article mailman.3009.1351516065.27098.python-l...@python.org,
Andrew Robinson andr...@r3dsolutions.com wrote:
Show me an example where someone would write a slice with a negative and
a positive index (both in the same slice);
and have that slice grab a contiguous slice in the *middle* of
Hi all
I'm pleased to announce 2 newly published articles in The Python Papers
(ojs.pythonpapers.org).
FUSE’ing Python for Development of Storage Efficient Filesystem
(http://ojs.pythonpapers.org/index.php/tpp/article/view/244)
Abstract: Filesystem is a core component of a functional operating
On Mon, Oct 29, 2012 at 8:23 AM, ic...@tagyourself.com wrote:
Hello all,
I am very new to python. I am currently porting a little project of mine from
java to python and I need to be able to construct and write png images. I
naturally turned myself toward pypng to accomplish this.
I
On Sun, Oct 28, 2012 at 4:09 PM, Gelonida N gelon...@gmail.com wrote:
The only thing I'm concerned about paramiko is, that I don't see any
activity on the paramiko site and that one library it depends on is not
available is windows binary package for newer versions of python.
I don't
- Original Message -
I have a philosofical doubt about immutability, that arised while
doing
the SCALA functional programming course.
Now suppose I have a simple NumWrapper class, that very stupidly
does:
class NumWrapper(object):
def __init__(self, number):
2012/10/29 Jean-Michel Pichavant jeanmic...@sequans.com:
return NumWrapper(self.number + 1)
still returns a(nother) mutable object.
So what's the point of all this ?
JM
Well sure but it doesn't modify the first object, just creates a new
one. There are in general good reasons to do
2012/10/29 andrea crotti andrea.crott...@gmail.com:
Well sure but it doesn't modify the first object, just creates a new
one. There are in general good reasons to do that, for example I can
then compose things nicely:
num.increment().increment()
or I can parallelize operations safely not
On 29/10/2012 15:20, andrea crotti wrote:
I have a philosofical doubt about immutability, that arised while doing
the SCALA functional programming course.
Now suppose I have a simple NumWrapper class, that very stupidly does:
class NumWrapper(object):
def __init__(self, number):
andrea crotti andrea.crott...@gmail.com writes:
and we want to change its state incrementing the number ...
the immutability purists would instead suggest to do this:
def increment(self):
return NumWrapper(self.number + 1)
Immutability purists would say that numbers don't have
- Original Message -
2012/10/29 Jean-Michel Pichavant jeanmic...@sequans.com:
return NumWrapper(self.number + 1)
still returns a(nother) mutable object.
So what's the point of all this ?
JM
Well sure but it doesn't modify the first object, just creates a new
one.
On Tue, Oct 30, 2012 at 2:55 AM, Paul Rubin no.email@nospam.invalid wrote:
andrea crotti andrea.crott...@gmail.com writes:
and we want to change its state incrementing the number ...
the immutability purists would instead suggest to do this:
def increment(self):
return
2012/10/29 Jean-Michel Pichavant jeanmic...@sequans.com:
In an OOP language num.increment() is expected to modify the object in place.
So I think you're right when you say that functional languages technics do
not necessarily apply to Python, because they don't.
I would add that what
2012/10/29 Chris Angelico ros...@gmail.com:
On Tue, Oct 30, 2012 at 2:55 AM, Paul Rubin no.email@nospam.invalid wrote:
andrea crotti andrea.crott...@gmail.com writes:
and we want to change its state incrementing the number ...
the immutability purists would instead suggest to do this:
Hi there,
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now I want A to call some private methods of B and vice versa (i.e. what
C++ friends
2012/10/29 Johannes Bauer dfnsonfsdu...@gmx.de:
Hi there,
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now I want A to call some
On Mon, Oct 29, 2012 at 9:33 AM, Johannes Bauer dfnsonfsdu...@gmx.de wrote:
Hi there,
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now
On Sun, Oct 28, 2012 at 10:40 PM, farrellpolym...@gmail.com wrote:
Hello to the group!
I've learned a lot about Ubuntu just trying to install numpy for Python
3.2.3. I've finally managed to put it in the Python3.2 directory but when I
try to import it, I still get there's no module named
On Tue, Oct 30, 2012 at 3:33 AM, Johannes Bauer dfnsonfsdu...@gmx.de wrote:
Hi there,
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now
andrea crotti andrea.crott...@gmail.com writes:
Also because how doi I make an immutable object in pure Python?
Numbers in Python are already immutable. What you're really looking for
is a programming style where you don't bind any variable more than once.
This gives rise to a programming
On 2012-10-29, Johannes Bauer dfnsonfsdu...@gmx.de wrote:
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now I want A to call some private
On 29.10.2012 17:47, Chris Angelico wrote:
The usual convention for private methods is a leading underscore on the name:
Yup, that's what I'm using.
It's only a convention, though; it doesn't make it hard to call
them, it just sends the message this is private, I don't promise that
it'll be
On 29.10.2012 17:52, Grant Edwards wrote:
By decleare them privide do you mean using __ASDF__ name-munging?
It sounds to me like you're just making life hard on yourself.
Gaah, you are right. I just noticed that using the single underscore
(as I do) does not restrict usage in any
Johannes Bauer wrote:
Now I want A to call some private methods of B and vice versa (i.e. what
C++ friends are), but I want to make it hard for the user to call
these private methods.
Currently my ugly approach is this: I delare the internal methods
private (hide from user). Then I have a
Johannes Bauer dfnsonfsdu...@gmx.de writes:
This makes the source files largish however (they're currently split up
in different files). Can I use the nested class advantage and somehow
include the inner class from another file?
You could possibly duck-punch class A:
import B
class A:
Johannes Bauer wrote:
On 29.10.2012 17:52, Grant Edwards wrote:
By decleare them privide do you mean using __ASDF__ name-munging?
It sounds to me like you're just making life hard on yourself.
Gaah, you are right. I just noticed that using the single underscore
(as I do) does not
On Oct 29, 2012 7:10 AM, Andrew Robinson andr...@r3dsolutions.com wrote:
I will be porting Python 3.xx to a super low power embedded processor
(MSP430), both space and speed are at a premium.
Running Python on top of Java would be a *SERIOUS* mistake. .NET won't even
run on this system.
On 10/29/2012 8:36 AM, Christian wrote:
Hi,
is there a way building an OrderedDict faster?
Thanks in advance
Christian
@timeit
def ordered(n=10):
d = OrderedDict()
for i in xrange(n):
d['key'+str(i)] = i
return d
try d = OrderedDict(['key'+str(i),i for i in
On Mon, Oct 29, 2012 at 1:54 AM, Andrew andrewr3m...@gmail.com wrote:
My intended inferences about the iterator vs. slice question was perhaps not
obvious to you; Notice: an iterator is not *allowed* in __getitem__().
Yes, I misconstrued your question. I thought you wanted to change the
On 10/29/2012 11:20 AM, andrea crotti wrote:
I have a philosofical doubt about immutability, that arised while doing
the SCALA functional programming course.
In real life, the physical world, things have mutable state, at least
down to the atomic level. Do you only want to model mathematical
On 10/29/2012 12:05 PM, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's
possible writing C extensions but I don't see in pure Python..
The short answer is: you don't, not really, except by using NamedTuple
if that gives you what you want.
The longer
On 10/29/2012 1:05 PM, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's
possible writing C extensions but I don't see in pure Python..
If you mean class with immutable instances, mutate new instances in
__new__ instead of __init__ and write a custom
On 2012-10-29, Johannes Bauer dfnsonfsdu...@gmx.de wrote:
On 29.10.2012 17:47, Chris Angelico wrote:
The usual convention for private methods is a leading underscore on the name:
Yup, that's what I'm using.
It's only a convention, though; it doesn't make it hard to call
them, it just sends
Do you have the file c:\Python33\Lib\site-packages\pypng-0.0.13-py3.3.egg ?
If not, you have not successfully installed pypng. Please try one of
the methods I gave above.
Yes I do have the egg.
I'm gonna try to summarize:
I don't have installations problems anymore but it seems that
On Mon, Oct 29, 2012 at 12:46 PM, Paul Rubin no.email@nospam.invalid wrote:
andrea crotti andrea.crott...@gmail.com writes:
Also because how doi I make an immutable object in pure Python?
Numbers in Python are already immutable. What you're really looking for
is a programming style where you
Too bad that's not (using python2.7)
'ordered_dict_generator' ((), {}) 1.089588 sec
Anyway thanks for your hint!
Hi,
is there a way building an OrderedDict faster?
Thanks in advance
Christian
@timeit
def ordered(n=10):
d = OrderedDict()
for i in
On Mon, Oct 29, 2012 at 10:58 AM, Johannes Bauer dfnsonfsdu...@gmx.de wrote:
Ah, that's nice. I didn't know that nested classes could access their
private members naturally (i.e. without using any magic, just with plain
old attribute access).
There is nothing at all special about nested
On Mon, Oct 29, 2012 at 10:12 AM, andrea crotti
andrea.crott...@gmail.com wrote:
Also because how doi I make an immutable object in pure Python?
I sometimes use namedtuples for this.
from collections import namedtuple
MyImmutableClass = namedtuple('MyImmutableClass', 'field1 field2 field3
On Tue, Oct 30, 2012 at 6:23 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
_MyImmutableClass = namedtuple('MyImmutableClass', 'field1 field2
field3 field4')
class MyImmutableClass(_MyImmutableClass):
Question: Is it clearer to take advantage of the fact that the base
class can be an arbitrary
On Mon, Oct 29, 2012 at 1:36 PM, Chris Angelico ros...@gmail.com wrote:
Question: Is it clearer to take advantage of the fact that the base
class can be an arbitrary expression?
class MyImmutableClass(namedtuple('MyImmutableClass', 'field1 field2
field3 field4')):
You lose the unnecessary
This Saturday, you have the opportunity of participating in the Python
Bug Day. How would you like to be one of the contributors of Python?
If you have ideas for improving parts of the official documentation, the
standard library, the language itself, or if you have a patch waiting
for a review
On 10/29/2012 04:18 PM, David Robinow wrote:
On Sun, Oct 28, 2012 at 4:09 PM, Gelonida N gelon...@gmail.com wrote:
The only thing I'm concerned about paramiko is, that I don't see any
activity on the paramiko site and that one library it depends on is not
available is windows binary package for
On 10/29/2012 02:10 PM, Roy Smith wrote:
In article mailman.2977.1351455364.27098.python-l...@python.org,
Gelonida N gelon...@gmail.com wrote:
The sh module looks intersting, but it's not supported for Windows
platforms.
The X module looks interesting but it's not supported for Windows is
On 10/29/2012 06:39 AM, ic...@tagyourself.com wrote:
That's very kind of you but I don't think it would be particularly fitted to my needs.
The program I'm trying to code creates an image as an 2D array of pixels
which is defined by RGBA value. My program needs to access and modifies every
On Mon, 29 Oct 2012 23:40:53 +1100, Chris Angelico wrote:
On Mon, Oct 29, 2012 at 3:52 PM, Andrew Robinson
andr...@r3dsolutions.com wrote:
I am curious as to how quickly it constructs the result compared to a
slice operation.
Eg:
a[1:5]
vs.
[ a[i] for i in xrange[1:5] ]
For the most
In article mailman.3048.1351547492.27098.python-l...@python.org,
Gelonida N gelon...@gmail.com wrote:
On 10/29/2012 02:10 PM, Roy Smith wrote:
In article mailman.2977.1351455364.27098.python-l...@python.org,
Gelonida N gelon...@gmail.com wrote:
The sh module looks intersting, but it's
On Mon, 29 Oct 2012 11:19:38 +, Steven D'Aprano wrote:
Because xrange represents a concrete sequence of numbers, all three of
start, end and stride must be concrete, known, integers:
py xrange(4, None, 2)
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: an
On 10/29/2012 06:52 AM, Roy Smith wrote:
Show me an example where someone would write a slice with a negative and
a positive index (both in the same slice);
and have that slice grab a contiguous slice in the *middle* of the list
with orientation of lower index to greater index.
It's possible in
Thomas Rachel wrote:
Am 26.10.2012 09:49 schrieb Ulrich Eckhardt:
Hi!
General advise when assembling strings is to not concatenate them
repeatedly but instead use string's join() function, because it avoids
repeated reallocations and is at least as expressive as any alternative.
On Mon, 29 Oct 2012 17:05:07 +, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's
possible writing C extensions but I don't see in pure Python..
Well, you can't *quite* make a truly immutable class in pure-Python,
because if *your* Python code can
On Tue, 30 Oct 2012 06:36:52 +1100, Chris Angelico wrote:
On Tue, Oct 30, 2012 at 6:23 AM, Ian Kelly ian.g.ke...@gmail.com
wrote:
_MyImmutableClass = namedtuple('MyImmutableClass', 'field1 field2
field3 field4')
class MyImmutableClass(_MyImmutableClass):
Question: Is it clearer to take
On Mon, 29 Oct 2012 17:33:24 +0100, Johannes Bauer wrote:
Hi there,
I'm currently looking for a good solution to the following problem: I
have two classes A and B, which interact with each other and which
interact with the user. Instances of B are always created by A.
Now I want A to
On Mon, Oct 29, 2012 at 3:30 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
On Mon, 29 Oct 2012 17:05:07 +, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's
possible writing C extensions but I don't see in pure Python..
Well, you
On 10/29/2012 10:09 AM, Ian Kelly wrote:
On Oct 29, 2012 7:10 AM, Andrew Robinsonandr...@r3dsolutions.com wrote:
I will be porting Python 3.xx to a super low power embedded processor (MSP430),
both space and speed are at a premium.
Running Python on top of Java would be a *SERIOUS* mistake.
Am Sonntag, 28. Oktober 2012 03:27:14 UTC+1 schrieb jann...@gmail.com:
Hello all,
I am new to Python and have a problem with the behaviour of the xml parser.
Assume we have this xml document:
?xml version=1.0 encoding=UTF-8?
bibliography
entry
Title of
On Tue, Oct 30, 2012 at 2:42 AM, Andrew Robinson
andr...@r3dsolutions.com wrote:
No, there was no error at all. Pthon just crashed exited; not even an
exception that I can recall. It was if it exited normally!
Can you create a reproducible test case? There's usually a cause to
these sorts
On Mon, Oct 29, 2012 at 9:20 AM, Andrew Robinson
andr...@r3dsolutions.com wrote:
FYI: I was asking for a reason why Python's present implementation is
desirable...
I wonder, for example:
Given an arbitrary list:
a=[1,2,3,4,5,6,7,8,9,10,11,12]
Why would someone *want* to do:
a[-7,10]
On Mon, 29 Oct 2012 15:20:02 +, andrea crotti wrote:
I have a philosofical doubt about immutability, that arised while doing
the SCALA functional programming course.
Philosophical. Like most words derived from the ancient Greeks, the F
sound uses ph rather than f.
Now suppose I have a
On Mon, Oct 29, 2012 at 9:42 AM, Andrew Robinson
andr...@r3dsolutions.com wrote:
The list was generated in a single pass by many .append() 's, and then
copied once -- the original was left in place; and then I attempted to slice
it.
Note that if the list was generated by .appends, then it was
On Mon, 29 Oct 2012 15:45:59 -0700, Chris Kaynor wrote:
On Mon, Oct 29, 2012 at 3:30 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
On Mon, 29 Oct 2012 17:05:07 +, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's
possible
All,
I need help with a date and time comparison.
Say a user enters a date-n-time and a file on disk. I want to compare the date
and time of the file to the entered date-n-time; if the file is newer than the
entered date-n-time, add the file to a list to process.
How best to do? I have
In article mailman.3056.1351552107.27098.python-l...@python.org,
Ian Kelly ian.g.ke...@gmail.com wrote:
On Mon, Oct 29, 2012 at 9:42 AM, Andrew Robinson
andr...@r3dsolutions.com wrote:
The list was generated in a single pass by many .append() 's, and then
copied once -- the original was
On Mon, Oct 29, 2012 at 5:24 PM, Roy Smith r...@panix.com wrote:
I think you're missing the point of amortized constant time. Yes, the
first item appended to the list will be copied lg(20,000,000) ~= 25
times, because the list will be resized that many times(*). But, on
average (I'm not sure
On 29 October 2012 23:01, Ian Kelly ian.g.ke...@gmail.com wrote:
On Mon, Oct 29, 2012 at 9:20 AM, Andrew Robinson
andr...@r3dsolutions.com wrote:
FYI: I was asking for a reason why Python's present implementation is
desirable...
I wonder, for example:
Given an arbitrary list:
On Mon, Oct 29, 2012 at 5:43 PM, Ian Kelly ian.g.ke...@gmail.com wrote:
The growth factor is approximately 1.125. Approximately because
there is also a small constant term. The average number of copies per
item converges on 8.
Of course, that is the *maximum* number of copies. The actual
On Mon, 29 Oct 2012 08:42:39 -0700, Andrew Robinson wrote:
But, why can't I just overload the existing __getitem__ for lists and
not bother writing an entire class?
You say that as if writing an entire class was a big complicated
effort. It isn't. It is trivially simple, a single line:
class
On 10/29/2012 04:13 PM, noydb wrote:
All,
I need help with a date and time comparison.
Say a user enters a date-n-time and a file on disk. I want to compare the date
and time of the file to the entered date-n-time; if the file is newer than the
entered date-n-time, add the file to a list to
In article mailman.3057.1351554215.27098.python-l...@python.org,
Ian Kelly ian.g.ke...@gmail.com wrote:
On Mon, Oct 29, 2012 at 5:24 PM, Roy Smith r...@panix.com wrote:
I think you're missing the point of amortized constant time. Yes, the
first item appended to the list will be copied
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