s=(1,2,3)
s=s+(4,5,6)
s
(1,2,3,4,5,6)
The tuple has changed.
I thought I read that tuples are sequences (like lists), but they are
immutable - They can't be changed once created. Could someone explain
please ?
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Sudip Bhattacharya wrote:
s=(1,2,3)
s=s+(4,5,6)
s
(1,2,3,4,5,6)
The tuple has changed.
No it hasn't. You have created a *new* tuple, and assigned it to the same
name. Consider:
py s = (1, 2, 3)
py id(s)
3083421332
py t = s
py id(t)
3083421332
This shows that both s and t are names for
On 8 March 2012 11:11, Sudip Bhattacharya sud...@sudipb.com wrote:
s=(1,2,3)
s=s+(4,5,6)
s
(1,2,3,4,5,6)
The tuple has changed.
No, the tuple hasn't changed. That's a *new* tuple. Consider:
Python 2.7.2 (default, Jun 12 2011, 14:24:46) [MSC v.1500 64 bit
(AMD64)] on win32
Type copyright,
Just to add, notice that even for lists,
l = l + [7,8,9]
produces a new list, while
l += [7,8,9]
does not.
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On 8 March 2012 18:11, Sudip Bhattacharya sud...@sudipb.com wrote:
s=(1,2,3)
s=s+(4,5,6)
s
(1,2,3,4,5,6)
The tuple has changed.
I thought I read that tuples are sequences (like lists), but they are
immutable - They can't be changed once created. Could someone explain please
?
I'm just a
On 8 March 2012 18:27, Walter Prins wpr...@gmail.com wrote:
Just to add, notice that even for lists,
l = l + [7,8,9]
produces a new list, while
l += [7,8,9]
does not.
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That makes perfect sense. What happened was that the old tuple got replaced
with a new tuple (old + new items) and NOT changed cause tuple is
immutable.
Thanks HTH.
On Thu, Mar 8, 2012 at 4:53 PM, col speed ajarnco...@gmail.com wrote:
On 8 March 2012 18:11, Sudip Bhattacharya sud...@sudipb.com
col speed wrote:
I was just thinking about the immutability of things and tried this
(which -at least I- find interesting:
id(1)
154579120
a = 1
id(a)
154579120
a += 2
id(a)
154579096
id(3)
154579096
a is 3
True
Although there is probably no other logical way of doing it - I learnt
On 8 March 2012 18:51, Steven D'Aprano st...@pearwood.info wrote:
col speed wrote:
I was just thinking about the immutability of things and tried this
(which -at least I- find interesting:
id(1)
154579120
a = 1
id(a)
154579120
a += 2
id(a)
154579096
id(3)
154579096
a is 3
From: Steven D'Aprano st...@pearwood.info
To: tutor@python.org
Sent: Thursday, March 8, 2012 7:51:33 AM
Subject: Re: [Tutor] Tuple - Immutable ?
col speed wrote:
I was just thinking about the immutability of things and tried this
(which -at least I- find
On 8 March 2012 19:18, John Jensen jensenjoh...@yahoo.com wrote:
From: Steven D'Aprano st...@pearwood.info
To: tutor@python.org
Sent: Thursday, March 8, 2012 7:51:33 AM
Subject: Re: [Tutor] Tuple - Immutable ?
col speed wrote:
I was just thinking about the
Hi,
I have been hearing this refactoring of code. Well does it have
any thing like this in Python and if it is then what is it all about.
Thanks.
Regards,
Ejaj
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Pythonistas,
Tinkering around this morning and noticed the following
when I created a tuple and asked for a dir() on it and some help() on
it.
x=('rod','jane','freddy')
dir(x)
['__add__', '__class__', '__contains__', '__delattr__', '__doc__',
'__eq__', '__format__',
col speed wrote:
On 8 March 2012 18:51, Steven D'Aprano st...@pearwood.info wrote:
This makes sense, and is easy to understand. Now for the real boggle:
py a = 9912346; b = 9912346
py a is b
True
Can you guess what is going on here?
(Answer will follow later.)
Because it's on the same
On 2012/03/08 03:13 PM, Ejaj Hassan wrote:
Hi,
I have been hearing this refactoring of code. Well does it have
any thing like this in Python and if it is then what is it all about.
Thanks.
Regards,
Ejaj
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Tutor maillist - Tutor@python.org
To
Hi,
I have been hearing this refactoring of code. Well does it have
any thing like this in Python and if it is then what is it all about.
Thanks.
Regards,
Ejaj
Refactoring is just a way of restructuring code. It can be breaking
code apart to more logical pieces -- moving parts of a class
Hi all,
I have just finished installing python on a centos machine but I don't know
where to begin learning this language.
Please help on how to go about after installation, any useful materials will
help.
Thanks regards,
Bozra Moses.
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Tutor
Ejaj Hassan wrote:
Hi,
I have been hearing this refactoring of code. Well does it have
any thing like this in Python and if it is then what is it all about.
Refactoring is a general technique that applies to any language, not just
Python. Refactoring means to take a program which is
Bozra Moses wrote:
Hi all,
I have just finished installing python on a centos machine but I don't know
where to begin learning this language.
Do you know how to search the internet? You should always try searching the
Internet first for an answer.
On Wed, Mar 7, 2012 at 11:36 PM, Steven D'Aprano st...@pearwood.info wrote:
Marko Limbek wrote:
I put the recommended code
savFileName =
C:/dropbox/Exc_MarkoL_Zenel/Valicon/crosstabs/Tabela/ipk108_kosovo_data_finale_c1-1.sav
with SavReader(savFileName) as sav:
header = sav.next()
Flynn, Stephen (L P - IT) wrote:
All pretty standard stuff. I did however notice that the
dir(x) told me about __class__, __reduce__ and __reduce_ex__ where the
help(x) made no mention of them. Why is this difference? I presume the
two commands using different means of getting
Hi Marko,
I'm going out on a limb here as I know next to nothing about either
SPSS or Albert-Jan's wrapper module, and so with that caveat, some
comments/observations:
On 8 March 2012 14:59, Marko Limbek marko.lim...@valicon.net wrote:
I overcame commenting. I managed to read my own file and
Hi,
I was just going through a book on python and came across this
'disutils'. Can somebody explained to me about this.
Regards,
Ejaj
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On 08/03/12 23:49, Ejaj Hassan wrote:
I was just going through a book on python and came across this
'disutils'. Can somebody explained to me about this.
I assume you mean distutils? If so here is the official help description:
DESCRIPTION
The main package for the
On 03/08/2012 06:49 PM, Ejaj Hassan wrote:
Hi,
I was just going through a book on python and came across this
'disutils'. Can somebody explained to me about this.
Regards,
Ejaj
Without mentioning the book, how are we supposed to guess what disutils
is? Or perhaps you meant distutils?
If
I have noticed the difference in terminals when using the Python
interpreter.
I am able to up-arrow to get the last typed command using rxvt but when I
use konsole and I press the up-arrow I get the symbols: ^[[A
Why is that? Is this the right place to ask this question? I want to be
able to
use
On Thu, Mar 08, 2012 at 09:07:46PM -0500, brandon w wrote:
I have noticed the difference in terminals when using the Python
interpreter.
I am able to up-arrow to get the last typed command using rxvt but when I
use konsole and I press the up-arrow I get the symbols: ^[[A
Why is that? Is this
I am using fluxbox an a window manager not KDE. That may have something to
do with it.
I will ask in another forum.
Running: import readline in both terminals succeded.
Thank you for your help.
Brandon
On Thu, Mar 8, 2012 at 9:58 PM, Steven D'Aprano st...@pearwood.info wrote:
On Thu, Mar
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