On 26Sep2017 20:55, Cai Gengyang wrote:
On Wednesday, September 27, 2017 at 6:45:00 AM UTC+8, Cameron Simpson wrote:
On 26Sep2017 14:43, Cai Gengyang wrote:
>C) Set bool_three equal to the result of
>19 % 4 != 300 / 10 / 10 and False
>
19 % 4 = 3 which is equal to 300 / 10 / 10 = 3, hence the
Steve D'Aprano wrote:
On Wed, 27 Sep 2017 02:03 am, Stefan Ram wrote:
Steve D'Aprano writes:
On Tue, 26 Sep 2017 03:26 am, Antoon Pardon wrote:
at that moment, but it still needed correction. If the assignment is
an alias operator then after the statements
Here's some C++ code that demonstr
Cai Gengyang wrote:
So does that mean that the way 'and' works in Python is that both terms must
be True (1) for the entire expression to be True ? Why is it defined that
way, weird ?
It's not weird, it's the normal meaning of "and" in English.
Do I have purple hair? No.
Do I have three nostri
r...@zedat.fu-berlin.de (Stefan Ram) writes:
> But it's a pattern when it means to strip the language
> of useless boilerplate and still following consistent
> and simple rules. That was what made Python great.
Yes. Python syntax allows for *mentioning* an object, and also allows
for *calli
r...@zedat.fu-berlin.de (Stefan Ram) writes:
> Why do we newbies write »print 2«? Here's another hint.
> This is an original transcript of what happened to me today:
[…]
> What happened? I woke up today in parens mood. So I typed:
>
> import( operator )
So, are you making the case that peo
On Wednesday, September 27, 2017 at 6:45:00 AM UTC+8, Cameron Simpson wrote:
> On 26Sep2017 14:43, Cai Gengyang wrote:
> >Help check if my logic is correct in all 5 expressions
>
> Why not just run some code interactively? Unless this is entirely a thought
> exercise to verify that you have a so
On 2017-09-27 03:48, Stefan Ram wrote:
Steve D'Aprano writes:
"Do What I Mean" (DWIM) programming is a terrible idea.
It's an anti-pattern, when one expects the implementation
to follow different and contradicting rules and then
somehow guess what was in the mind of the programmer.
On Wed, 27 Sep 2017 02:03 am, Stefan Ram wrote:
> Steve D'Aprano writes:
>>On Tue, 26 Sep 2017 03:26 am, Antoon Pardon wrote:
>>>at that moment, but it still needed correction. If the assignment is
>>>an alias operator then after the statements
>>Here's some C++ code that demonstrates it. Apologi
On Wed, 27 Sep 2017 08:23 am, Cai Gengyang wrote:
>
> I'm trying to understand the logic behind AND. I looked up Python logic tables
>
> False and False gives False
> False and True gives False
> True and False gives False
> True and True gives True.
>
> So does that mean that the way 'and' wor
On 27/09/17 00:23, Cai Gengyang wrote:
> I'm trying to understand the logic behind AND. I looked up Python logic tables
>
> False and False gives False
> False and True gives False
> True and False gives False
> True and True gives True.
>
> So does that mean that the way 'and' works in Python is t
On Wed, 27 Sep 2017 06:00 am, Stefan Ram wrote:
> Python could have taken the indentation of the
> next line to tell that this is supposed to be
> a function definition and not a function call.
"Do What I Mean" (DWIM) programming is a terrible idea.
--
Steve
“Cheer up,” they said, “things cou
>
> On Sep 26, 2017, at 3:23 PM, Cai Gengyang wrote:
>
>
> I'm trying to understand the logic behind AND. I looked up Python logic tables
>
> False and False gives False
> False and True gives False
> True and False gives False
> True and True gives True.
>
> So does that mean that the way 'a
On 09/27/2017 12:23 AM, Cai Gengyang wrote:
>
> I'm trying to understand the logic behind AND. I looked up Python logic tables
>
> False and False gives False
> False and True gives False
> True and False gives False
> True and True gives True.
>
> So does that mean that the way 'and' works in P
On 09/26/2017 10:49 PM, Paul Moore wrote:
> On 26 September 2017 at 19:47, Irmen de Jong wrote:
>> Any thoughts on this? Is it a good idea or something horrible? Has
>> someone attempted something like this before perhaps?
>
> When I've done this, I've bundled my dependencies in with my zipapp.
>
On 26Sep2017 15:23, Cai Gengyang wrote:
I'm trying to understand the logic behind AND. I looked up Python logic tables
False and False gives False
False and True gives False
True and False gives False
True and True gives True.
So does that mean that the way 'and' works in Python is that both
On 26Sep2017 14:43, Cai Gengyang wrote:
Help check if my logic is correct in all 5 expressions
Why not just run some code interactively? Unless this is entirely a thought
exercise to verify that you have a solid mental understanding of Python
semantics, all your reasoning is easy to test.
On 09/26/2017 03:23 PM, Cai Gengyang wrote:
I'm trying to understand the logic behind AND. I looked up Python logic tables
False and False gives False
False and True gives False
True and False gives False
True and True gives True.
So does that mean that the way 'and' works in Python is that bo
I'm trying to understand the logic behind AND. I looked up Python logic tables
False and False gives False
False and True gives False
True and False gives False
True and True gives True.
So does that mean that the way 'and' works in Python is that both terms must be
True (1) for the entire expr
On Tuesday, September 26, 2017 at 2:54:32 PM UTC-7, Chris Angelico wrote:
> On Wed, Sep 27, 2017 at 7:43 AM, Cai Gengyang wrote:
> > Help check if my logic is correct in all 5 expressions
> >
> >
> > A) Set bool_one equal to the result of
> > False and False
> >
> > Entire Expression : False and F
On Tue, Sep 26, 2017 12:00 PM, Steve D'Aprano
wrote:
>
> a = 1
>> b = a
>> b = 2
>>
>> a is not 2.
>
< snip >
int main () {
> int a;
> int& b = a; // reference variable or alias
>
> a = 1;
> printf("a: %d, alias b: %d\n", a, b);
> b = 2;
> printf("a: %d, alias b: %d\n", a, b);
> r
On Wed, Sep 27, 2017 at 7:43 AM, Cai Gengyang wrote:
> Help check if my logic is correct in all 5 expressions
>
>
> A) Set bool_one equal to the result of
> False and False
>
> Entire Expression : False and False gives True because both are False
This is not correct, and comes from a confusion in
Help check if my logic is correct in all 5 expressions
A) Set bool_one equal to the result of
False and False
Entire Expression : False and False gives True because both are False
B) Set bool_two equal to the result of
-(-(-(-2))) == -2 and 4 >= 16 ** 0.5
-(-(-(-2))) is equal to 2, and 2 i
On 26 September 2017 at 19:47, Irmen de Jong wrote:
> Any thoughts on this? Is it a good idea or something horrible? Has
> someone attempted something like this before perhaps?
When I've done this, I've bundled my dependencies in with my zipapp.
Of course that's trickier if you have binary depend
On Wed, Sep 27, 2017 at 6:00 AM, Stefan Ram wrote:
> r...@zedat.fu-berlin.de (Stefan Ram) writes:
>>Stefan Behnel writes:
>>>But would you also write this?
> ...
>>>def(func(a,b,c)):
>>>return(a+b+c)
>>No, this not.
>
> What I wrote was like:
>
> func( a, b, c )
> return a+b+c
>
Rhodri James :
> On 25/09/17 20:40, Marko Rauhamaa wrote:
>> A pointer is something that points to a data object.
>
> In that case you are using "pointer" in such an informal sense that
> making deductions from it is unlikely to be successful.
Propose a name for the concept. Candidates so far: "p
On 09/26/2017 09:19 PM, Thomas Jollans wrote:
>> - use venv.EnvBuilder() to create a new virtualenv somewhere in the
>> user's home directory (~./virtualenvs/mygreatgame ?)
>
> The appropriate place for this kind of thing, on Linux, would be
> $XDG_DATA_HOME, default "~/.local/share/", i.e.:
>
>
On Wed, Sep 27, 2017 at 5:24 AM, Grant Edwards
wrote:
> On 2017-09-26, alister via Python-list wrote:
>> On Tue, 26 Sep 2017 14:16:47 +, Grant Edwards wrote:
>>
>>> On 2017-09-26, Ned Batchelder wrote:
On 9/25/17 10:20 PM, Steve D'Aprano wrote:
> On Tue, 26 Sep 2017 02:54 am, Ned Ba
On Wed, Sep 27, 2017 at 5:19 AM, Stefan Behnel wrote:
> print() and help() are definitely not worth being keywords. They do not
> impact the program flow, they don't do any assignments, nothing. That's why
> they are simple functions.
If anything, help() could benefit more from language support t
On 2017-09-26, alister via Python-list wrote:
> On Tue, 26 Sep 2017 14:16:47 +, Grant Edwards wrote:
>
>> On 2017-09-26, Ned Batchelder wrote:
>>> On 9/25/17 10:20 PM, Steve D'Aprano wrote:
On Tue, 26 Sep 2017 02:54 am, Ned Batchelder wrote:
[...]
>>> We've been asked
Op 2017-09-26, Stefan Ram schreef :
> What happened? I woke up today in parens mood. So I typed:
>
> import( operator )
>
> Python told me that I should type:
>
> import operator
>
> . Fine, Python conditioned me to omit the parens.
> So now I was in noparens mood. So I typed:
>
> help ope
On 26/09/17 20:47, Irmen de Jong wrote:
> Hi,
> I've been using Python's executable zip application feature to neatly
> package my little game into a single "executable" file.
> Here "executable" means the user can simply start it by doubleclicking
> it, or launching it from a shell prompt. Of cour
Stefan Ram schrieb am 26.09.2017 um 17:56:
> Why do we newbies write »print 2«? Here's another hint.
> This is an original transcript of what happened to me today:
>
> |>>> import( operator )
> | File "", line 1
> |import( operator )
> | ^
> |SyntaxError: invalid syntax
> |
> |>>
Op 2017-09-25, Stefan Ram schreef :
> So, is there some mechanism in Python that can bind a method
> to an object so that the caller does not have to specify the
> object in the call?
>
> If so, how is this mechanism called?
>
Others have already explained the details how functions become
On Tuesday, September 26, 2017 at 12:32:18 PM UTC-3, Bernie Connors wrote:
> Hello,
>
> My first post here on C.L.P. I have only written a few python scripts
> in 2.7 and now I'm trying my first python 3 script. Can you tell me why this
> snippet won't run?
> ---
> fr
Hi,
I've been using Python's executable zip application feature to neatly
package my little game into a single "executable" file.
Here "executable" means the user can simply start it by doubleclicking
it, or launching it from a shell prompt. Of course the user already has
to have a proper Python in
On 2017-09-26 18:25, alister via Python-list wrote:
>>> We've been asked nicely by the list mod to stop :)
>>
>> Perhaps we could agree on a subject line tag to be used in all
>> threas arguing about what to call the Python argument passing
>> scheme? That way the other 99% of us could pre-empt
On Wed, Sep 27, 2017 at 4:25 AM, alister via Python-list
wrote:
> On Tue, 26 Sep 2017 14:16:47 +, Grant Edwards wrote:
>
>> On 2017-09-26, Ned Batchelder wrote:
>>> On 9/25/17 10:20 PM, Steve D'Aprano wrote:
On Tue, 26 Sep 2017 02:54 am, Ned Batchelder wrote:
[...]
>>
On Tue, 26 Sep 2017 14:16:47 +, Grant Edwards wrote:
> On 2017-09-26, Ned Batchelder wrote:
>> On 9/25/17 10:20 PM, Steve D'Aprano wrote:
>>> On Tue, 26 Sep 2017 02:54 am, Ned Batchelder wrote:
>>> [...]
>>>
>>>
>>>
>> We've been asked nicely by the list mod to stop :)
>
> Perhaps we could a
Bernie Connors wrote:
> On Tuesday, September 26, 2017 at 12:32:18 PM UTC-3, Bernie Connors wrote:
>> Hello,
>>
>> My first post here on C.L.P. I have only written a few python
>> scripts in 2.7 and now I'm trying my first python 3 script. Can
>> you tell me why this snippet w
Jerry Hill wrote:
> On Tue, Sep 26, 2017 at 12:32 PM, Peter Otten <__pete...@web.de> wrote:
>> Newer Python versions will show
>>
>> Help on built-in function sin in module math:
>>
>> sin(x, /)
>> Return the sine of x (measured in radians).
>>
>>
>> where the arguments before the slash are po
On Tuesday, September 26, 2017 at 12:32:18 PM UTC-3, Bernie Connors wrote:
> Hello,
>
> My first post here on C.L.P. I have only written a few python scripts
> in 2.7 and now I'm trying my first python 3 script. Can you tell me why this
> snippet won't run?
> ---
> fr
On Tue, Sep 26, 2017 at 12:32 PM, Peter Otten <__pete...@web.de> wrote:
> Newer Python versions will show
>
> Help on built-in function sin in module math:
>
> sin(x, /)
> Return the sine of x (measured in radians).
>
>
> where the arguments before the slash are positional-only:
What version o
Stefan Ram wrote:
> Here's a console transcript:
>
> |>>> from math import sin
> |>>> help( sin )
> |Help on built-in function sin in module math:
> |
> |sin(...)
> |sin(x)
> |
> |Return the sine of x (measured in radians).
> |
> |>>> sin( x = 2.0 )
> |Traceback (most recent call last):
On 26-09-17 14:28, Steve D'Aprano wrote:
> On Tue, 26 Sep 2017 03:26 am, Antoon Pardon wrote:
>
>> Sorry, what he wrote contradicts that. Maybe he was just really confused
>> at that moment, but it still needed correction. If the assignment is
>> an alias operator then after the statements
>>
>> a
On 26/09/2017 15:16, Grant Edwards wrote:
On 2017-09-26, Ned Batchelder wrote:
On 9/25/17 10:20 PM, Steve D'Aprano wrote:
On Tue, 26 Sep 2017 02:54 am, Ned Batchelder wrote:
[...]
We've been asked nicely by the list mod to stop :)
Perhaps we could agree on a subject line tag to be used i
On 2017-09-26 16:41, Veek M wrote:
> Thanks - i'm on debian stretch so python 2.7 is what I use.
https://packages.debian.org/stretch/python3
https://packages.debian.org/stretch/python3-pyqt4
https://packages.debian.org/stretch/python3-pyqt5
--
https://mail.python.org/mailman/listinfo/python-li
On 2017-09-26 16:31, berniejconn...@gmail.com wrote:
Hello,
My first post here on C.L.P. I have only written a few python scripts
in 2.7 and now I'm trying my first python 3 script. Can you tell me why this
snippet won't run?
---
from urllib.request import urlopen
On 2017-09-26 17:31, berniejconn...@gmail.com wrote:
> Hello,
>
> My first post here on C.L.P. I have only written a few python scripts
> in 2.7 and now I'm trying my first python 3 script. Can you tell me why this
> snippet won't run?
What do you mean, "won't run"? Is there an error me
Hello,
My first post here on C.L.P. I have only written a few python scripts in
2.7 and now I'm trying my first python 3 script. Can you tell me why this
snippet won't run?
---
from urllib.request import urlopen
with
urlopen('http://geonb.snb.ca/arcgis/rest/services
[This announcement is in German since it targets a local user group
meeting in Düsseldorf, Germany]
ANKÜNDIGUNG
Python Meeting Düsseldorf
http://pyddf.de/
Ein Tref
On Wed, Sep 27, 2017 at 12:41 AM, Veek M wrote:
> Thanks - i'm on debian stretch so python 2.7 is what I use.
Debian Stretch ships with Python 3.5 too.
ChrisA
--
https://mail.python.org/mailman/listinfo/python-list
On Tuesday, September 26, 2017 at 2:23:22 PM UTC+5:30, Thomas Jollans wrote:
> On 2017-09-26 08:16, Veek M wrote:
> > On Tuesday, September 26, 2017 at 11:18:54 AM UTC+5:30, Veek M wrote:
> >> Summary: Could someone explain widget and dialog parenting - the text book
> >> is not making sense.
> >>
On 2017-09-26, Ned Batchelder wrote:
> On 9/25/17 10:20 PM, Steve D'Aprano wrote:
>> On Tue, 26 Sep 2017 02:54 am, Ned Batchelder wrote:
>> [...]
>>
>>
>
> We've been asked nicely by the list mod to stop :)
Perhaps we could agree on a subject line tag to be used in all threas
arguing about what t
On 2017-09-26, Chris Angelico wrote:
> On Tue, Sep 26, 2017 at 10:51 PM, gvim wrote:
>> Has anyone had any success using Python scripting to automate
>> processes for small businesses as a side job? I'd like to use
>> my Python skills to supplement my income with about 4 hours'
>> work a week.
>
On 9/25/2017 5:37 PM, Thomas Jollans wrote:
On 25/09/17 18:44, john polo wrote:
Python List,
I am trying to make practice data for plotting purposes. I am using
Python 3.6. The instructions I have are
import matplotlib.pyplot as plt
import math
import numpy as np
t = np.arange(0, 2.5, 0.1)
y1
On Tue, Sep 26, 2017 at 10:51 PM, gvim wrote:
> Has anyone had any success using Python scripting to automate processes for
> small businesses as a side job? I'd like to use my Python skills to
> supplement my income with about 4 hours' work a week.
Python scripting for automation is definitely a
Has anyone had any success using Python scripting to automate processes
for small businesses as a side job? I'd like to use my Python skills to
supplement my income with about 4 hours' work a week.
gvim
--
https://mail.python.org/mailman/listinfo/python-list
On Tue, 26 Sep 2017 03:26 am, Antoon Pardon wrote:
>>> I'm not sure that Steve knows how it works. When he denies that the
>>> assignment is an alias operation in Python that casts an important doubt.
>>
>> I can assure you that Steve knows how it works. Again, the disagreement is
>> almost certa
On 25/09/17 21:00, Tim Golden wrote:
(Slight sigh). Can I step in as a list owner and ask the people who are
so very fond of debating this topic again and again: please let it drop.
But, but... someone on the internet is wrong!
https://www.facebook.com/playingrapunzel/videos/10153716804864491/
On 25/09/17 20:40, Marko Rauhamaa wrote:
Rhodri James :
On 25/09/17 15:26, Marko Rauhamaa wrote:
That's not what I said. I said all expressions *evaluate to* pointers.
This may well be true in particular implementations, but it is an
implementation detail so Chris' point still stands. Anothe
Antoon Pardon :
> Op 26-09-17 om 12:09 schreef Marko Rauhamaa:
>> I don't think the clear description of Python's semantics requires the
>> use of such terms ("alias", "call by XXX"). It would be enough to
>> specify what actually happens.
>
> I agree, but the fact that one doesn't require a parti
Op 26-09-17 om 12:09 schreef Marko Rauhamaa:
> Antoon Pardon :
>
>> That wont happen as long as people continue to do damage with e.g.
>> claiming that the python assignment is not an alias operation.
>>
>> There is IMO no conceptual damage by regarding the call semantics
>> as call by reference.
>
Antoon Pardon :
> That wont happen as long as people continue to do damage with e.g.
> claiming that the python assignment is not an alias operation.
>
> There is IMO no conceptual damage by regarding the call semantics
> as call by reference.
I don't think the clear description of Python's seman
Op 26-09-17 om 11:13 schreef Ben Finney:
> Steve D'Aprano writes:
>
>> On Mon, 25 Sep 2017 10:53 pm, Ned Batchelder wrote:
>>
>>> Would we be able to end these interminable debates if we just agree
>>> that we all know how it works,
>> If only that were true. Not everyone understands Python semant
On 26Sep2017 04:48, Kryptxy wrote:
Here -
p = subprocess.Popen(["transmission-gtk", link], stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
output, error = p.communicate()
Peter> That"s the problem. communicate() *must* block to collect the program"s
Peter> entire output. You get what you ask
Ben Finney :
> No, we cannot just agree that we all know how it works. The well is
> poisoned for a long time, and we must diligently undo the conceptual
> damage for generations to come; and I know of no better way than
> continuing to publicly discuss how both misapprehensions are wrong.
For st
Steve D'Aprano writes:
> On Mon, 25 Sep 2017 10:53 pm, Ned Batchelder wrote:
>
> > Would we be able to end these interminable debates if we just agree
> > that we all know how it works,
>
> If only that were true. Not everyone understands Python semantics (or
> for that matter, Java/Swift/languag
On 2017-09-26 08:16, Veek M wrote:
> On Tuesday, September 26, 2017 at 11:18:54 AM UTC+5:30, Veek M wrote:
>> Summary: Could someone explain widget and dialog parenting - the text book
>> is not making sense.
>> ##
>> I'm trying to understand widget parenting, from the book: Ra
> Original Message
> Subject: Re: Running a GUI program haults the calling program (linux)
> Local Time: 26 September 2017 1:26 PM
> UTC Time: 26 September 2017 07:56
> From: __pete...@web.de
> To: python-list@python.org
>
> Kryptxy via Python-list wrote:
>
>> Sent with [ProtonMai
Chris Angelico :
> I've explained Python's (or JavaScript's, since they're the same)
> object model to a number of novice programmers without any
> difficulties, without talking about pointers or invisible values or
> any of that junk. There are just two things to explain: the concept of
> names r
Kryptxy via Python-list writes:
> Yep. I will wait for a response. Thank you!
There remains, of course, the option to keep developing and distributing
the work under GNU GPL.
As Chris points out, the GNU GPL terms are plenty permissive enough and
keep the playing field guaranteed level for all.
Kryptxy via Python-list wrote:
> Sent with [ProtonMail](https://protonmail.com) Secure Email.
>
>> Original Message
>> Subject: Re: Running a GUI program haults the calling program (linux)
>> Local Time: 26 September 2017 12:09 PM
>> UTC Time: 26 September 2017 06:39
>> From: c.
On 25Sep2017 20:38, Kryptxy wrote:
I want to run a GUI program (transmission-gtk) from python. This is what I do:
import subprocess
subprocess.Popen(['transmission-gtk', link], stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
Where `link` is some magnetic link.
This command opens transmission
Ben Bacarisse wrote:
Think functional! This is 257 characters:
250 chars, 17 shorter than the text it produces:
a=[];o=[];n=[];A=list.append
for b in range(3,-1,-1):
x=bool(b>>1);y=bool(b&1);A(a,"%s and %s is %s"%(x,y,x and y));A(o,"%s or %s is
%s"%(x,y,x or y))
if x:A(n,"not %s is %s"%(y
Sent with [ProtonMail](https://protonmail.com) Secure Email.
> Original Message
> Subject: Re: Running a GUI program haults the calling program (linux)
> Local Time: 26 September 2017 12:09 PM
> UTC Time: 26 September 2017 06:39
> From: c...@cskk.id.au
> To: Kryptxy
> python-lis
Sent with [ProtonMail](https://protonmail.com) Secure Email.
> Original Message
> Subject: Re: Running a GUI program haults the calling program (linux)
> Local Time: 26 September 2017 6:20 AM
> UTC Time: 26 September 2017 00:50
> From: ros...@gmail.com
> To: python-list
>
> On T
Op 25-09-17 om 21:44 schreef Ned Batchelder:
>
> Wikipedia has the right definition of call by reference
> (https://en.wikipedia.org/wiki/Evaluation_strategy#Call_by_reference):
>
> /Call by reference/ (also referred to as /pass by reference/) is an
> evaluation strategy where a function rece
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