On 08/10/2017 04:28 PM, Steve D'Aprano wrote:
Every few years, the following syntax comes up for discussion, with some people
saying it isn't obvious what it would do, and others disagreeing and saying
that it is obvious. So I thought I'd do an informal survey.
What would you expect this syntax
On 05/29/2017 03:14 PM, Poul Riis wrote:
In good old pascal there was this one-liner command:
repeat until keypressed
Apparently there is no built-in analogue for that in python. I have explored
several different possibilities (pyglet, keyboard, curses, ginput (from
matplotlib) and others) but
On 04/18/2017 02:48 AM, Ethan Furman wrote:
On 04/17/2017 03:23 PM, Ben Finney wrote:
So I will continue to treat all those topics equally: peripheral
comments on beliefs are just part of respectful human discourse, so long
as I'm respectful of the people who may hold such beliefs.
So you're o
On 04/10/2017 07:29 AM, Deborah Swanson wrote:
Fully recognizing that most of what you wrote was tongue-in-cheek, I
just want to say that regardless of the wonders of modern medicine, it's
a pity they learn so little about successful medicines other than their
own. In other academic scientific di
On 01/09/2017 04:53 AM, Steven D'Aprano wrote:
Suppose you have an expensive calculation that gets used two or more times in a
loop. The obvious way to avoid calculating it twice in an ordinary loop is with
a temporary variable:
result = []
for x in data:
tmp = expensive_calculation(x)
On 01/10/2017 05:43 AM, Steven D'Aprano wrote:
Is it silly to create an enumeration with only a single member? That is, a
singleton enum?
Don't think so, for the same reason that lists with one element make sense.
def ham(arg):
if isinstance(arg, MarxBros) or arg is Unique.FOO:
On 10/27/2016 02:55 PM, Chris Angelico wrote:
On Thu, Oct 27, 2016 at 11:33 PM, jmp wrote:
On 10/27/2016 01:43 PM, Chris Angelico wrote:
Blocked threads don't consume CPU time. Why would they?
ChrisA
Agreed. My point being that a blocked thread achieve nothing, except
parallelism
On 10/27/2016 01:43 PM, Chris Angelico wrote:
Blocked threads don't consume CPU time. Why would they?
ChrisA
Agreed. My point being that a blocked thread achieve nothing, except
parallelism, i.e. other threads can be processed.
To be more specific, if you compute factorial(51354) in a thre
On 10/27/2016 12:22 PM, pozz wrote:
Anyway I don't like this approach, because the main (and single) thread
should check in_waiting every X milliseconds.
If X is too high, I could wait for the answer even if it is already
ready in the input buffer.
If X is too low, the application consumes a lot
On 10/26/2016 02:45 PM, pozz wrote:
Il 26/10/2016 13:16, jmp ha scritto:
[...]
I suggest you write a GUI that make synchronouscalls to a remote
application, if possible. If the remote app is in python, you have
access to remote protocols already written for you, Pyro is one of them,
you can
On 10/26/2016 12:22 PM, pozz wrote:
Il 26/10/2016 09:13, pozz ha scritto:
> [...]
When the user press Start button (the pressed handler is in the GUI
class):
self.comm_active = True
threading.Thread(target=self.comm_thread).start()
The backend thread is:
def comm_thread(self):
whil
On 10/07/2016 03:45 PM, ast wrote:
"jmp" a écrit dans le message de
news:mailman.210.1475844513.30834.python-l...@python.org...
On 10/07/2016 02:07 PM, ast wrote:
"jmp" a écrit dans le message de
news:mailman.209.1475841371.30834.python-l...@python.org...
On 10/07/2
On 10/07/2016 02:07 PM, ast wrote:
"jmp" a écrit dans le message de
news:mailman.209.1475841371.30834.python-l...@python.org...
On 10/07/2016 01:38 PM, Daiyue Weng wrote:
So the rule of thumb for default argument value is "No mutable"
Cheers,
It can be used to
On 10/07/2016 01:38 PM, Daiyue Weng wrote:
Hi, I declare two parameters for a function with default values [],
def one_function(arg, arg1=[], arg2=[]):
PyCharm warns me:
Default argument value is mutable,
what does it mean? and how to fix it?
cheers
You'll run into this bug
def foo(a=[])
On 10/05/2016 11:33 PM, Chris Angelico wrote:
On Thu, Oct 6, 2016 at 8:19 AM, Beverly Howard wrote:
Thanks for the responses... appreciated.
print("value value data data data", end="\r") <<
That makes sense, but it also seems to suggest that there is no other way to
position the cursor pri
On 09/27/2016 04:01 PM, Peng Yu wrote:
Hi, In many other functional language, one can change the closure of a
function. Is it possible in python?
http://ynniv.com/blog/2007/08/closures-in-python.html
If I understood correctly your link:
(untested)
def func(x):
return x+func.y
func.y = 1
On 09/26/2016 06:54 PM, Cai Gengyang wrote:
What is a tab and what is a space in python and what's the difference ?
Which piece of code is indented with tabs and which one is indented with spaces
?
Please do not top-post in this list. Put your text after the message you
quote.
Tabs and sp
On 09/26/2016 05:25 PM, Cai Gengyang wrote:
I just wanted to note that sometimes the code works, sometimes it doesn't.
(even though both are exactly the same code) ... Weird , dum dum dum
for row in range(10):
for column in range(10):
print("*",end="")
SyntaxError:
On 09/25/2016 03:20 AM, chitt...@uah.edu wrote:
On Sunday, September 11, 2016 at 3:56:36 PM UTC-5, chit...@uah.edu wrote:
(about being frustrated with sphinx)
I _remain_ frustrated - even as I finally figured out how to use it (thanks to
a complete example from a friend)
sphinx is very picky a
On 09/11/2016 02:12 PM, Chris Angelico wrote:
On Thu, Sep 8, 2016 at 7:27 PM, Joaquin Alzola
wrote:
I have worked places where they put stuff like this at the bottom of emails
sent to the person sitting next to them :) -raising entropy-ly yrs- Robin Becker
Cannot do anything about it. It is
On 09/12/2016 03:11 AM, Chris Angelico wrote:
On Mon, Sep 12, 2016 at 6:30 AM, Sven R. Kunze wrote:
I could not agree more with what you said above, so I hope this will put the
discussion in better perspective, especially when people here trying to be
overly absolute in their views (which was
On 09/08/2016 10:52 PM, Ben Finney wrote:
Joaquin Alzola writes:
That's not true; you can do more than we.
Added by the MTA of the company not by my client.
Right. So, here are things you can do (that we cannot) about this:
* Complain, with reasoned explanation, to the management respon
On 09/06/2016 04:55 PM, GP wrote:
I have a list:
shelves2 =[{'Part No': '1', 'Length': 610.0, 'Width': 50.0},
{'Part No': '2', 'Length': 2319.0, 'Width': 465.0 },
{'Part No': '3', 'Length': 5.0,'Width': 465.0}]
The length of shelf is calculated as follows:
1. Calculate the max
On 09/05/2016 05:41 PM, Smith wrote:
Il 05/09/2016 17:34, Rustom Mody ha scritto:
So what do you get when you replace the if-else with a simple:
print(file)
a = input("search for files with the extension .py into directory: ")
for file in os.listdir(a):
if file.endswith(".py"):
On 09/05/2016 05:27 PM, Smith wrote:
Hello to all,
I wanted to know because even though the files are present on the
directory I write input gives me "file not found".
You can help me?
Thank you
a = input("Digita la directory dove vuoi trovare i file py: ")
for file in os.listdir(a):
if fi
On 07/04/2016 01:37 PM, Chris Angelico wrote:
On Mon, Jul 4, 2016 at 9:23 PM, jmp wrote:
On 07/01/2016 04:13 PM, Steven D'Aprano wrote:
But classes are not like the others: they must be instantiated before they
can be used, and they are more than just a mere namespace grouping re
On 07/01/2016 04:13 PM, Steven D'Aprano wrote:
But classes are not like the others: they must be instantiated before they
can be used, and they are more than just a mere namespace grouping related
entities. Classes support inheritance. Classes should be used for "is-a"
relationships, not "has-a"
On 06/22/2016 04:46 PM, Jignesh Sutar wrote:
Say I have list of data as given in the example code below, I want to find
all the unique categories (alphabetic letters) and unique IDs (numbers) and
then produce a summary grid as manually entered in the "results". How could
I code this?
Many thanks
On 05/16/2016 09:31 PM, Grant Edwards wrote:
On 2016-05-16, jmp wrote:
Have you considered upgrading the device with a recent CPU ? Or is it
completely out of the picture ?
Not an option. We have to continue to support devices that are in the
field. The newer models that are coming out
On 05/16/2016 06:06 PM, Grant Edwards wrote:
This is not Python specific, though I'm turning to Python to do some
experimentation and to try to prototype a solution.
Is there any way to limit the number of connections a browser uses to
download a web page? Browser writers seems to assume that a
se an exception, otherwise I don't know :o)
It seems to me that over-writing silently (or not) may lead to bugs
difficult to spot.
jmp
--
https://mail.python.org/mailman/listinfo/python-list
On 05/03/2016 10:02 AM, musoke wilson wrote:
Hi Guys
Currently working with a team to automate business operations and client
support for a small enterprise.
Key requirements:
Clients to register, log queries and initiate service request through The Web
and/or Mobile APP
Clear tracking by the
On 04/13/2016 12:12 PM, Antoon Pardon wrote:
I have been looking at the enum documentation and it
seems enums are missing two features I rather find
important.
1) Given an Enum value, someway to get the next/previous
one
2) Given two Enum values, iterate over the values between
them.
D
On 03/10/2016 02:41 PM, Ben Mezger wrote:
Hi all,
I've been studying Object Oriented Theory using Java. Theoretically, all
attributes should be private, meaning no one except the methods itself
can access the attribute;
public class Foo {
private int bar;
...
Normally in Java, we wou
On 03/10/2016 07:59 PM, Neal Becker wrote:
sohcahto...@gmail.com wrote:
On Thursday, March 10, 2016 at 10:33:47 AM UTC-8, Neal Becker wrote:
Is there a way to ensure resource cleanup with a construct such as:
x = load (open ('my file', 'rb))
Is there a way to ensure this file gets closed?
On 03/08/2016 05:49 PM, justin walters wrote:
Correct me if I'm wrong, but don't python generators usually use the yield
statement so they can be used in list comprehensions?
Hello,
Please don't top post.
Generator expressions are different from generator functions. They are
both generators
On 03/07/2016 11:51 PM, Fillmore wrote:
learning Python from Perl here. Want to do things as Pythonicly as
possible.
I am reading a TSV, but need to skip the first 5 lines. The following
works, but wonder if there's a more pythonc way to do things. Thanks
ctr = 0
with open(prfile,mode="rt",enc
On 03/07/2016 09:46 AM, ZhangXiang wrote:
In python3, when I write code like this:
try:
fields = [getattr(Product, field) for field in fields.split(',')]
except AttributeError as e:
raise HTTPError(...)
I want to raise a new type of error giving a string telling the user which
attrib
On 02/11/2016 07:07 PM, ltomassm...@gmail.com wrote:
I thought a dictionary would be a good idea because of the key restrictions
ensuring no duplicates, so the data would always update - However because they
are unordered and I need to do some more processing on the data afterwards I'm
having
On 02/08/2016 12:29 PM, egarr...@gmail.com wrote:
I am using the "logging" module for my own package, but changing the level from "INFO" to
"DEBUG" enables debugging statements from third-party libraries as well. How can I avoid them?
Here is the code I am using:
import logging
lo
On 01/28/2016 02:15 PM, ast wrote:
hello
Here is a class from django framework
from django.db import models
class Article(models.Model):
titre = models.CharField(max_length=100)
auteur = models.CharField(max_length=42)
contenu = models.TextField(null=True)
date = models.DateT
On 01/15/2016 05:08 PM, Tim Chase wrote:
[sorry, toddler on my lap clicked before I could type]
import struct
with open('toto', 'wb') as f: f.write(struct.pack('<4B', *[1,2,3,4]))
This one does what you want. The problem resides in your check:
I always end up with the following bytes on f
Hi pyple !
I'd like to write a stream of bytes into a file. I'd like to use the
struct (instead of bytearray) module because I will have to write more
than bytes.
let's say I want a file with 4 bytes in that order:
01 02 03 04
None of these work:
import struct
with open('toto', 'wb') as
On 12/22/2015 05:29 AM, KP wrote:
From my first foray into XML with Python:
I would like to retrieve this list from the XML upon searching for the 'config'
with id attribute = 'B'
config = {id: 1, canvas: (3840, 1024), comment: "a comment",
{id: 4, gate: 3, (0,0, 1280, 102
On 12/14/2015 11:38 PM, Vincent Davis wrote:
In the code below try is used to check if handle has the attribute name. It
seems an if statement could be used. Is there reason one way would be
better than another?
def write_header(self):
handle = self.handle
try:
handle.write("#
On 12/03/2015 10:27 AM, c.bu...@posteo.jp wrote:
I often saw constructions like this
x for x in y if ...
But I don't understand that combination of the Python keywords (for,
in, if) I allready know. It is to complex to imagine what there really
happen.
I understand this
for x in y:
if
On 10/19/2015 03:42 PM, Storey, Geneva wrote:
Our technician will be here this morning to take a look. I'll let you know
what we find.
Thanks again,
Geneva Storey
import turtle
print turtle.__file__
may help you find the offending file.
jm
--
https://mail.python.org/mailman/listinfo/pyt
On 10/01/2015 09:12 PM, Steven D'Aprano wrote:
On Wed, 30 Sep 2015 07:21 pm, jmp wrote:
Is Ariel's xml file user-supplied? If so, how does your suggestion
prevent the resulting lua script from executing arbitrary code?
It does not. Like it doesn't fulfill the milli
On 09/29/2015 07:28 PM, Peter Otten wrote:
jmp wrote:
import bs4
import jinja2
xml = """
BuenosAires
30
Seatle
25
"""
lua_template = """
cities_temps ={
{%- for city, temp i
On 09/28/2015 11:41 PM, Ariel Argañaraz wrote:
Hi,
This is my first post, I would like to know if a library that can help
me with this.
I want to parse a XML fle with Python and save the data into a Lua table
called for example "newTable", then I want to create a "table.lua" fle
with the "newTa
On 09/29/2015 01:02 PM, jmp wrote:
class GameObject:
@property
def id(self):
return id(self) #use the builtin id function
print GameObject().id
Cheers,
JM
I should add that until you don't serialize your object you're fine.
If you need to serialize it, you may want
On 09/29/2015 11:27 AM, ple...@gmail.com wrote:
I have a perplexing problem with Python 3 class variables.
Your problem is that when assigning values to your class attribute, you
are actually creating a instance attribute.
class Foo:
bar = "I'm a class attribute"
def __init__(self):
On 09/24/2015 04:26 PM, Ian Kelly wrote:
On Thu, Sep 24, 2015 at 8:07 AM, jmp wrote:
result = getResult()
For the later, the original weird form come from a C habit to allocate
returned structures within the caller and provide a pointer to it so the
function can fill the data in, otherwise
On 09/24/2015 03:45 PM, paul.hermeneu...@gmail.com wrote:
>> I'm suprised. Why not just:
>>
>> list(str(results))
>>
>> In other words, is there something else the list constructor should do
>> with a string other than convert it to a list?
>>
> The OP wanted the result to be a list of in
On 09/24/2015 02:50 PM, paul.hermeneu...@gmail.com wrote:
> A lot of our in base weird python comes from heavily C-wired people:
>
> The classic
> for i in range(len(alist)):
> print alist[i]
>
> with its twin brother
>
> i=0
> while i < len(alist):
> print alist[i]
> i += 1
>
On 09/24/2015 08:02 AM, Steven D'Aprano wrote:
I was looking at an in-house code base today, and the author seems to have a
rather idiosyncratic approach to Python. For example:
for k, v in mydict.items():
del(k)
...
instead of the more obvious
for v in mydict.values():
...
On 09/16/2015 02:53 PM, Jussi Piitulainen wrote:
But now I expect to see a long thread about whether
chained comparisons are a natural thing to have in the language.
Nice forecast by the way.
JM
--
https://mail.python.org/mailman/listinfo/python-list
On 09/16/2015 02:16 PM, Blake T. Garretson wrote:
1 in {1:1} == 1 #test2
The second test yield False, because True does not equal 1, apparently. Fair
enough.
No, it yields False because {1:1} == 1 is false. Test 2 looks actually like
(1 in {1:1}) and ({1:1} == 1).
Which in your example
On 09/15/2015 11:35 AM, Thomas Güttler wrote:
Yes, I could do it this way.
But somehow I am not happy with this solution.
I think the filtering should be outside of python.
[snip]
Can you understand my concerns?
Thomas Güttler
No, not really.
I showed you how it can be done in p
On 09/11/2015 09:22 AM, Thomas Güttler wrote:
I want INFO to be logged and stored on the remote host.
Therefore I must not filter INFO messages.
I don't want to pull INFO messages over the VPN.
Ergo, the filtering at Python level does not help in my use case.
Or I am missing something.
Proba
On 09/08/2015 03:57 PM, Chris Angelico wrote:
On Tue, Sep 8, 2015 at 9:37 PM, wrote:
Some where i am missing simple logic :)
=
child = pexpect.spawn('ssh hari@hostname')
child.logfile = sys.stdout
child.expect('hari\'s Password: ')
=
getting error as follows:
child.e
On 09/01/2015 07:08 AM, Jahn wrote:
1.
How can I save 256 lists, each list has 32 values( hexadecimal numbers)
2.
How to compare the saved lists with another 256 lists ( that are read online
and have the
same structure as the list one)?
( the first list must be saved in the previous step)
E.
On 08/28/2015 11:24 AM, Marko Rauhamaa wrote:
Would you rather be an powerful, armed war hero admired and feared by
your nation or a foresaken unemployed drunkard who rots in jail?
Marko
Time to quote the most famous general in the galaxy:
“Ohhh. Great warrior.Wars not make one great.” ;)
J
On 08/26/2015 11:20 PM, Terry Reedy wrote:
On 8/26/2015 12:36 PM, Jean-Michel Pichavant wrote:
[snip]
Are you allowed to use a newsreader or a mail+newsreader (Outlook
Express, Thunderbird, )? If so post through newsgroup
gmane.comp.python.general at news.gmane.org (as I am).
I screwed alread
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