On Tue, Jul 31, 2018 at 02:58:56AM +1000, Steven D'Aprano wrote:
> The *only* thing you have seen which is a language feature is this rule:
>
> - if two objects, a and b, have the same ID *at the same time*, then
> "a is b" will be true;
>
> - if "a is b" is false, then a and b must have diff
On 30/07/18 19:11, Zachary Ware wrote:
> On Mon, Jul 30, 2018 at 1:08 PM Alan Gauld via Tutor wrote:
>> There are lots of options including those suggested elsewhere.
>> Another involves using get() which makes your function
>> look like:
>>
>> def viceversa(d):
>> new_d = dict()
>> for k
On 30/07/18 08:24, Matthew Polack wrote:
> I'm trying to simply add an image to our program to make the GUI more
> interesting...but most of the tutorials describe using the 'Pack'
> method not the grid method of layout...
That's completely irrelevant since you can add images to widgets
regar
Matthew Polack wrote:
> Hi,
>
> Steadily trying to learn Python and Tkinter here with our students...
>
> Am working on a simple 'Price of Cereal Crop' calculatorand have made
> a start with the code below...
>
> I'm trying to simply add an image to our program to make the GUI more
> intere
On Mon, Jul 30, 2018 at 1:08 PM Alan Gauld via Tutor wrote:
> There are lots of options including those suggested elsewhere.
> Another involves using get() which makes your function
> look like:
>
> def viceversa(d):
> new_d = dict()
> for k in d:
> for e in d[k]:
> new
On 30/07/18 13:40, Valerio Pachera wrote:
> users = {'user1':['office-a', 'office-b'],
> 'user2':['office-b'],
> 'user3':['office-a','office-c']}
>
> It's a list of users.
> For each user there's a list of room it can access to.
>
> I wish to get the same info but "sorted" by room.
Re
Zachary Ware wrote:
> On Mon, Jul 30, 2018 at 12:20 PM Valerio Pachera wrote:
>> I was looking to substiture the cicle for e in new_d like this:
>> [ new_d[e].append(k) if e in new_d else new_d[e].append(k) for e in
>> [ d[k] ]
>> but it can't work because 'new_d[e] = []' is missing.
>
> Hav
On Mon, Jul 30, 2018 at 12:20 PM Valerio Pachera wrote:
> I was looking to substiture the cicle for e in new_d like this:
> [ new_d[e].append(k) if e in new_d else new_d[e].append(k) for e in d[k] ]
> but it can't work because 'new_d[e] = []' is missing.
Have a look at `dict.setdefault` and pla
Hi all, consider this dictionary
users = {'user1':['office-a', 'office-b'],
'user2':['office-b'],
'user3':['office-a','office-c']}
It's a list of users.
For each user there's a list of room it can access to.
Generalizing, a dictionary with a list for each element.
d = {k:list}
I wi
- Messaggio originale -
> Da: "Tutor Python"
> A: "Tutor Python"
> Inviato: Sabato, 28 luglio 2018 0:06:55
> Oggetto: Re: [Tutor] Do something on list elements
> But better still is a list comprehension:
>
> l = [s.replace('X','') for s in l)
> print(l)
Thank you all for the answers.
L
On Mon, Jul 30, 2018 at 09:21:01AM -0600, Mats Wichmann wrote:
> (id does not necessarily mean memory location, by the way)
id() *never* means memory location in Python. id() *always* returns an
opaque integer ID number which has no promised meaning except to be
unique while the object is alive
On Mon, Jul 30, 2018 at 3:20 PM, Sunil Tech wrote:
> Python memory allocation is varying in all these use cases. Please help me
> understand.
CPython is interning small integers and small strings as a form of optimisation.
"The current implementation keeps an array of integer objects for all
int
Hi,
Steadily trying to learn Python and Tkinter here with our students...
Am working on a simple 'Price of Cereal Crop' calculatorand have made a
start with the code below...
I'm trying to simply add an image to our program to make the GUI more
interesting...but most of the tutorials describ
On Mon, Jul 30, 2018 at 06:50:59PM +0530, Sunil Tech wrote:
> Hi Team,
>
> I am investigating how the memory allocation happens in Python
You cannot investigate memory allocation in Python code, because the
Python execution model does not give you direct access to memory.
What you can investiga
On 07/30/2018 07:20 AM, Sunil Tech wrote:
> Hi Team,
>
> I am investigating how the memory allocation happens in Python
There are several things going on here, but the main thing to know is:
but Python language _implementations_ optimize when they can and think
it makes sense. So don't draw too m
On Mon, Jul 30, 2018 at 9:20 AM, Sunil Tech wrote:
> Hi Team,
>
> I am investigating how the memory allocation happens in Python
> For Eg:
> *Case 1:*
>
a = 10
b = 10
c = 10
id(a), id(b), id(c)
> (140621897573616, 140621897573616, 140621897573616)
a += 1
id(a)
> 14062
Hi Team,
I am investigating how the memory allocation happens in Python
For Eg:
*Case 1:*
>>> a = 10
>>> b = 10
>>> c = 10
>>> id(a), id(b), id(c)
(140621897573616, 140621897573616, 140621897573616)
>>> a += 1
>>> id(a)
140621897573592
*Case 2:*
>>> x = 500
>>> y = 500
>>> id(x)
4338740848
>>>
17 matches
Mail list logo
