On 5/9/14 7:58 PM, Steven D'Aprano wrote:
{snip} at which
point we're now talking about a concrete, physical description of the
process, not an abstraction. There really is a bottom-most turtle that
holds up all the rest.)
hi Steven, heh... yup, there really is a bottom-most turtle (and who
c
On Fri, 09 May 2014 17:30:10 -0500, Mark H Harris wrote:
> On 5/7/14 8:31 PM, Chris Angelico wrote:
>> On Thu, May 8, 2014 at 4:11 AM, Mark H Harris
>> wrote:
>>> And we must never forget that CPython's underpinnings, uhm C, uses
>>> variables, C ones... (never mind)
>>
>> Be careful of this one
On 5/7/14 8:31 PM, Chris Angelico wrote:
On Thu, May 8, 2014 at 4:11 AM, Mark H Harris wrote:
And we must never forget that CPython's underpinnings, uhm C, uses
variables, C ones... (never mind)
Be careful of this one. It's utterly irrelevant to your point, and may
be distracting. I could im
On 5/7/14 8:08 PM, Steven D'Aprano wrote:
In Python, all values *are* objects. It isn't a matter of choosing one or
the other. The value 1 is an object, not a native (low-level, unboxed) 32
or 64 bit int.
Unlike C# or Java, there is no direct language facility to box native
values into objects o
On Thu, May 8, 2014 at 7:22 AM, Marko Rauhamaa wrote:
> Mark H Harris :
>
>> A == B
>> True
>>
>> A is B
>> False
>>
>> [...]
>>
>> This is just one of a dozen 'different' kinds of examples. And the
>> answer is the same, Python does not have variables, Python has names
>> bound to objects.
>
> Th
On Thu, May 8, 2014 at 4:11 AM, Mark H Harris wrote:
> And we must never forget that CPython's underpinnings, uhm C, uses
> variables, C ones... (never mind)
Be careful of this one. It's utterly irrelevant to your point, and may
be distracting. I could implement Ook in Python; does that mean tha
On Thu, 08 May 2014 00:22:55 +0300, Marko Rauhamaa wrote:
> But hey, we can open another thread for whether Python has values or
> objects!
In Python, all values *are* objects. It isn't a matter of choosing one or
the other. The value 1 is an object, not a native (low-level, unboxed) 32
or 64 b
Mark H Harris :
> A == B
> True
>
> A is B
> False
>
> [...]
>
> This is just one of a dozen 'different' kinds of examples. And the
> answer is the same, Python does not have variables, Python has names
> bound to objects.
That is a different topic and isn't related to variables at all.
Instead,
On 5/6/14 6:46 PM, Chris Angelico wrote:
Is there really a fundamental
difference between languages in which that is equally valid syntax and
does exactly the same thing?
No. And from that standpoint, python has variables. I know, because I
thought about python's 'variables' as variables for
On Tue, 06 May 2014 19:54:28 -0700, Rustom Mody wrote:
> The number of possible concepts is infinite
>
> The number of words is finite (even assuming unicode!!)
Not true. If you allow longer and longer words, with no upper limit, the
number of words is also infinite.
If you allow compound word
On Wednesday, May 7, 2014 8:09:34 AM UTC+5:30, Chris Angelico wrote:
> On Wed, May 7, 2014 at 12:18 PM, Rustom Mody wrote:
> > Wrong conclusion!
> > These 3 lines look the same and amount to much the same in python and C.
> > But as the example widens to something beyond 3 lines, the difference
> >
On Wed, May 7, 2014 at 12:18 PM, Rustom Mody wrote:
> Wrong conclusion!
>
> These 3 lines look the same and amount to much the same in python and C.
>
> But as the example widens to something beyond 3 lines, the difference
> will become more and more significant
Python, C, REXX, BASIC, and pretty
On Wednesday, May 7, 2014 5:16:16 AM UTC+5:30, Chris Angelico wrote:
> On Wed, May 7, 2014 at 7:00 AM, Mark H Harris wrote:
> Is this code mutating or rebinding?
> x = 1.1
> y = 2.2
> x = x + y
Heh! Neat example!
> What language did I write that in? Is there really a fundamental
> difference
On Tue, 06 May 2014 15:16:54 -0400, Terry Reedy wrote:
> On 5/5/2014 8:39 PM, Satish Muthali wrote:
>> Hello experts,
>>
>> I have a burning question on how to pass variable by reference in
>> Python.
>
> Python passes objects to functions. CPython implements
On Tue, 06 May 2014 16:31:35 -0400, Ned Batchelder wrote:
> On 5/6/14 12:42 AM, Gary Herron wrote:
>> This gets confusing, but in fact the most accurate answer is that
>> Python does not have "variables", so there is no such thing as passing
>> "variables" by reference or any other method. Python
On Wed, May 7, 2014 at 9:55 AM, Ben Finney wrote:
>> If you want to insist that Python has no variables, you will have to
>> also say that neither do Javascript, Ruby, Java, PHP, etc.
>
> I don't know enough Ruby to comment there. For Java, Javascript, PHP,
> they *do* have variables that work pre
Ned Batchelder writes:
> This meme bugs me so much. Python has variables. They work differently
> than variables in C.
Which is why it's useful to intervene right at the start when someone
comes in with assumptions about “variables”; it's better that they
discard that baggage and learn about ref
On Wed, May 7, 2014 at 7:00 AM, Mark H Harris wrote:
> What does the word "variable" mean. Think BASIC variables. You can set them,
> you can reset them, you can delete them, you can change them. ... because
> they are variable.
>
> Python has names bound to objects... some of which you may not c
be changed." The
word "change" here is ambiguous: it could mean mutating an existing
value, or rebinding to another value. While I can't mutate immutable
values, I can always rebind a Python name to another value.
Python cannot do "pass variable by reference", but not
On 5/6/14 3:31 PM, Ned Batchelder wrote:
On 5/6/14 12:42 AM, Gary Herron wrote:
This gets confusing, but in fact the most accurate answer is that Python
does not have "variables", so there is no such thing as passing
"variables" by reference or any other method. Python *does* have names
bound t
On 05/05/2014 06:39 PM, Satish Muthali wrote:
> I want to nuke /var/lib/postgresql/9.3.4/main/data , however
> programatically I want it to be as: /var/lib/postgresql/ pgversion>/main/data
>
> Any help is appreciated.
Not sure really. But if you want to pass a some data around that can be
manip
On 5/6/14 12:42 AM, Gary Herron wrote:
This gets confusing, but in fact the most accurate answer is that Python
does not have "variables", so there is no such thing as passing
"variables" by reference or any other method. Python *does* have names
bound to values, but that's a very different thin
On 5/5/2014 8:39 PM, Satish Muthali wrote:
Hello experts,
I have a burning question on how to pass variable by reference in
Python.
Python passes objects to functions. CPython implements this by passing
object pointers. In one sense, your request is impossible. In another,
it already
On Tue, May 6, 2014 at 8:38 PM, Marko Rauhamaa wrote:
> Chris Angelico :
>
>>> characters, words, lines = stats.read()
>>
>> That's not really pass-by-reference, though. What you're doing is
>> output parameters, which are usually implemented in C with pointers,
>> but in Python with a return
Chris Angelico :
>> characters, words, lines = stats.read()
>
> That's not really pass-by-reference, though. What you're doing is
> output parameters, which are usually implemented in C with pointers,
> but in Python with a return tuple.
Correct, but it is worth questioning the question itsel
On Tue, May 6, 2014 at 7:11 PM, Marko Rauhamaa wrote:
> Steven D'Aprano :
>
>> On Mon, 05 May 2014 17:39:44 -0700, Satish Muthali wrote:
>>> I have a burning question on how to pass variable by reference in
>>> Python. I understand that the data type has to be m
Steven D'Aprano :
> On Mon, 05 May 2014 17:39:44 -0700, Satish Muthali wrote:
>> I have a burning question on how to pass variable by reference in
>> Python. I understand that the data type has to be mutable.
>
> [...]
>
> To get an effect *similar* to pass
On Mon, 05 May 2014 17:39:44 -0700, Satish Muthali wrote:
> Hello experts,
>
> I have a burning question on how to pass variable by reference in
> Python. I understand that the data type has to be mutable.
Python provides neither pass-by-reference nor pass-by-value argument
pas
On 05/05/2014 05:39 PM, Satish Muthali wrote:
Hello experts,
I have a burning question on how to pass variable by reference in
Python. I understand that the data type has to be mutable.
This gets confusing, but in fact the most accurate answer is that Python
does not have "variables
On Tuesday, May 6, 2014 6:09:44 AM UTC+5:30, Satish Muthali wrote:
> Hello experts,
> I have a burning question on how to pass variable by reference in Python.
Technically correct answer: You cant. But see below.
> I understand that the data type has to be mutable.
I dont know that m
Hello experts,
I have a burning question on how to pass variable by reference in Python. I
understand that the data type has to be mutable.
For example, here’s the issue I am running in to:
I am trying to extract the PostgreSQL DB version for example:
pgVer = [s.split() for s in os.popen
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