On Sun, 24 Dec 2017 12:20 pm, Cai Gengyang wrote:
> How many lines of code in Python would it take to create a Go-playing AI
> like AlphaGo ? Estimates ?
Somewhere between 1 and 1 billion.
How about you start by telling us:
- do you mean AlphaGo or AlphaGo Zero?
- how many lines of code AlphaG
On Sat, 23 Dec 2017 04:38 pm, Peng Yu wrote:
> Hi, I only can find the doc for @. What does @@ mean in python?
I don't think that @@ means anything yet.
There was a proposal to use @@ for matrix exponentiation in Numpy, as @ is
used for matrix multiplication, but that was left on hold to see whe
On Sat, 23 Dec 2017 03:01 pm, Peng Yu wrote:
> Hi, The following example shows that both locals() and globals() are
> updated when x and f are defined. Shouldn't they be considered and
> global variable and functions only? Why does it make sense to set
> locals() as well? Thanks.
There are three
On Sat, 23 Dec 2017 03:50 pm, Peng Yu wrote:
> Where is it documented that __xor__ and ^ is the same as
> symmetric_difference? Thanks.
You read
https://docs.python.org/2/library/stdtypes.html#set
to learn that ^ is the same as symmetric difference, and then read:
https://docs.python.org/2/re
On Sat, 23 Dec 2017 02:35 pm, Peng Yu wrote:
> Hi, I see the following two lines are the same. But I'd like to find
> where ^ is documented via the help() function (I am not looking for
> the document in html)? Does anybody know? Thanks.
>
> s.symmetric_difference(t)
> s ^ t
You can call:
help
On Sat, 23 Dec 2017 01:48 am, andrewpat...@gmail.com wrote:
> On Monday, October 25, 2010 at 11:07:42 AM UTC+1, kj wrote:
>> In "The Zen of Python", one of the "maxims" is "flat is better than
>> nested"? Why? Can anyone give me a concrete example that illustrates
>> this point?
>>
>> TIA!
>>
On Thu, 21 Dec 2017 12:42 pm, Peng Yu wrote:
> Hi,
>
> R has the function edit() which allows the editing of the definition
> of a function. Does python have something similar so that users can
> edit python functions on the fly? Thanks.
>
> https://www.rdocumentation.org/packages/utils/versions
On Thu, 21 Dec 2017 08:37 am, Bill wrote:
> namenobodywa...@gmail.com wrote:
>> On Tuesday, December 19, 2017 at 3:28:39 PM UTC-8, Steve D'Aprano wrote:
>>
>>> Does this have anything specifically to do with Python programming?
>> i'm working on a game-p
This is possibly a question for the list admins...
I notice that Lawrence D’Oliveiro has taken up labelling his posts with a
demand that his posts are not to be posted to the Python-List mailing list.
I also see that his posts are not showing up on the mailing list archive. Is
this a coincidence
On Wed, 20 Dec 2017 07:23 am, namenobodywa...@gmail.com wrote:
> On Monday, December 18, 2017 at 10:16:07 PM UTC-8, Terry Reedy wrote:
>
>> Where or how have you looked so far? How formal do you want?
>
> i want full-on formal with lots of rigor and every possible detail spelled
> out; i've loo
On Tue, 19 Dec 2017 02:27 am, ast wrote:
> I discovered that log functions from math module
> works with integers, whatever their size, there is
> no conversion to float.
>
>> import math
>> x = 123456**123456
>> math.log10(x)
> 628577.7303641582 (instantaneous)
>
> so 628578 digits
Nice!
I
On Sat, 16 Dec 2017 12:25 am, ast wrote:
>
> "Thomas Jollans" a écrit dans le message de
> news:mailman.74.1513341235.14074.python-l...@python.org...
>> On 2017-12-15 11:36, ast wrote:
>
>
>> No, this is right. The calculation takes practically no time; on my
>> system, it takes some 10 ns. Th
On Fri, 15 Dec 2017 10:47 pm, Thomas Jollans wrote:
> On 2017-12-15 11:36, ast wrote:
>> Hi
>>
>> Time measurment with module timeit seems to work with some statements
>> but not with some other statements on my computer.
>>
>> Python version 3.6.3
>>
>> from timeit import Timer
>>
> Timer
On Fri, 15 Dec 2017 09:36 pm, ast wrote:
[...]
> It's OK, with 10 more loops I get 10 more execution time.
>
> But with exponentiation, it's a mess
>
Timer("x=123456**123456").timeit(1)
> 6.076191311876755e-06
Timer("x=123456**123456").timeit(10)
> 3.841270313387213e-06
>
> All wrong,
On Fri, 15 Dec 2017 09:48 am, Gregory Ewing wrote:
> Rhodri James wrote:
>> Even then there was RiscOS, which divorced file names from file types
>> entirely.
>
> As did classic MacOS.
Classic MacOS associated two such pieces of metadata with each file: the
creator and type. Regardless of the op
On Fri, 15 Dec 2017 09:09 pm, Tim Golden wrote:
> Apart from anything else these need to be raw strings:
>
> sys.path.append(r'C:\Python27\Lib\lib-tk')
Don't use raw strings for paths. It's a trap:
r'C:\Python27' # okay
r'C:\Python27\' # fails
Windows supports / as directory separator. Yo
On Thu, 14 Dec 2017 09:08 pm, ayaskant.mantu...@gmail.com wrote:
> Hi,
>
> I want to replace the spaces in a sting with hyphen with my own replace
> function or with using the pre-defined replace function. Can anybody help me
> with this issue???
new_string = "string with spaces".replace(" ", "h
On Mon, 11 Dec 2017 11:29 am, Chris Angelico wrote:
> On Mon, Dec 11, 2017 at 10:10 AM, Rick Johnson
> wrote:
>> And it's not like we can just pick file up and shake
>> it, in a crude attempt to intuit the contents.
>
> No, but fortunately we have magic. And magic can tell us a lot about
> what
On Sun, 10 Dec 2017 04:52 am, MRAB wrote:
> Try updating __dict__:
>
> Opts.__dict__.update(json.load(open("mybuffer")))
__dict__ is implementation, vars() is the public interface:
vars(Opts).update(json.load(open("mybuffer")))
Looks nicer too :-)
--
Steve
“Cheer up,” they said, “th
On Sun, 10 Dec 2017 02:01 pm, Chris Angelico wrote:
> On Sun, Dec 10, 2017 at 12:56 PM, Steve D'Aprano
> wrote:
>> Remember the context here: we're replying to a thread discussing somebody
>> who is running Ubuntu with a GUI desktop environment. Of course there are
&
On Fri, 8 Dec 2017 12:08 pm, Python wrote:
> But more importantly, practically speaking, it still doesn't really
> provide much more help to the OP than Lawrence's answer.
I wasn't responding to the OP, I was responding to Lawrence. If I had a
solution for the OP beyond what others have already s
On Sat, 9 Dec 2017 09:57 am, Gilmeh Serda wrote:
> And next demands to allow Unicode as keywords in a translated version of
> Python
> will make open source go away. For good.
Do you seriously think that because *one* project forks their code base and
introduces non-English keywords, the tens o
On Sun, 10 Dec 2017 09:20 am, Terry Reedy wrote:
> On 12/9/2017 5:57 AM, Gilmeh Serda wrote:
>
>> And next demands to allow Unicode as keywords in a translated version of
>> Python
>
> Python's liberal open source license allows people to revise and
> distribute their own python or python-like i
On Wed, 6 Dec 2017 11:54 am, John Pote wrote:
[...]
> Ran above test file and got,
> >>python36 compiletest.py
> at 0x02120E40, file "", line 1>
>
>
> SPAM scrambled
Thanks everyone, that's what I wanted to see.
--
Steve
â £Cheer up,â Ø they said, â £things could be worse.â Ø So I ch
On Wed, 6 Dec 2017 12:21 pm, Chris Angelico wrote:
> On Wed, Dec 6, 2017 at 11:54 AM, John Pote
> wrote:
>>
>> On 06/12/2017 00:16, Steve D'Aprano wrote:
>>>
>>> Anyone got a handy copy of Python 3.6 available to test something for me?
>>>
>
On Wed, 6 Dec 2017 03:45 pm, Abhiram R wrote:
> On Wed, Dec 6, 2017 at 10:08 AM, km wrote:
>
>> I dont know how these students are selected into b tech stream in India.
>> they are so dumb. All they know is a to open a program we need to double
>> click it and it runs.
>>
>> We were all once "dum
On Wed, 6 Dec 2017 04:20 am, Jason wrote:
> I ran into this:
>
https://stackoverflow.com/questions/27707581/why-does-csv-dictreader-skip-empty
-lines
>
> # unlike the basic reader, we prefer not to return blanks,
> # because we will typically wind up with a dict full of None
> # values
>
> while i
On Tue, 5 Dec 2017 07:58 pm, Lawrence Dâ ÖOliveiro wrote:
> On Tuesday, December 5, 2017 at 3:39:26 AM UTC+13, Rick Johnson wrote:
>>
>> Sounds like your OS file associations are all botched-up ...
>
> Linux doesnâ Öt do â £OS file associationsâ Ø.
Then how does my Linux box know that when I dou
Anyone got a handy copy of Python 3.6 available to test something for me?
What does compile('f"{spam} {eggs}"', '', 'single') return?
What does eval()'ing the above compiled object do? If necessary, you may have
to define spam and eggs first.
Thanks in advance.
--
Steve
â £Cheer up,â Ø they s
On Thu, 7 Dec 2017 01:31 pm, nick martinez wrote:
> interesting, what version of python are you using? Tried it multiple times
> and it still isn't working.
Please launch a terminal window, copy this command exactly into the terminal
and hit ENTER. You should have a $ or maybe % prompt for this
On Thu, 7 Dec 2017 11:58 am, nick martinez wrote:
> I'm stuck. I need my program to round the end solution to 2 decimal places
> but cant figure it out. Can someone help? I've been trying between printf
> and round() but cant seem to get either to work.
It might help if you show exactly what valu
On Thu, 7 Dec 2017 08:22 am, Python wrote:
> On Wed, Dec 06, 2017 at 10:35:58AM +1100, Steve D'Aprano wrote:
>> On Tue, 5 Dec 2017 07:58 pm, Lawrence D’Oliveiro wrote:
>>
>> > On Tuesday, December 5, 2017 at 3:39:26 AM UTC+13, Rick Johnson wrote:
>>
On Thu, 7 Dec 2017 07:59 am, Bryan Zimmer wrote:
> I have been getting this message, "No module named '_socket'", since I
> installed python 3.6, about two months ago.
>
> My platform is Slackware Linux (14.2). I compiled python3.6 from source,
> because binary python packages aren't distributed
On Wed, 6 Dec 2017 04:54 pm, Chris Angelico wrote:
> On Wed, Dec 6, 2017 at 4:27 PM, km wrote:
>> Remember that you are wasting time of lakhs of python subscribers by
>> asking such dumb questions being tech students. You people can Google and
>> watch movies / songs online and you can't find
On Wed, 6 Dec 2017 11:25 pm, Rustom Mody wrote:
> On Wednesday, December 6, 2017 at 4:05:43 PM UTC+5:30, Steve D'Aprano wrote:
>> On Wed, 6 Dec 2017 02:49 pm, Rustom Mody wrote:
>>
>> > You are assuming that the strangeness of the request is about 'tech'
&
On Thu, 7 Dec 2017 02:33 am, Dennis Lee Bieber wrote:
> On Wed, 06 Dec 2017 11:06:39 +1100, Steve D'Aprano
> declaimed the following:
>
>
>>I wouldn't want to guess your mental health based just on this isolated
>>incident, but if I had to make a diagno
On Wed, 6 Dec 2017 02:49 pm, Rustom Mody wrote:
> You are assuming that the strangeness of the request is about 'tech'
> [engineering/tech existed centuries before computers]
>
> Do remember one can be a tech-{student,professional} without
> - ever having encountered free-software
> - internet/US
On Wed, 6 Dec 2017 03:45 pm, Abhiram R wrote:
> On Wed, Dec 6, 2017 at 10:08 AM, km wrote:
>
>> I dont know how these students are selected into b tech stream in India.
>> they are so dumb. All they know is a to open a program we need to double
>> click it and it runs.
>>
>> We were all once "du
On Wed, 6 Dec 2017 12:21 pm, Chris Angelico wrote:
> On Wed, Dec 6, 2017 at 11:54 AM, John Pote
> wrote:
>>
>> On 06/12/2017 00:16, Steve D'Aprano wrote:
>>>
>>> Anyone got a handy copy of Python 3.6 available to test something for me?
>>>
>
On Wed, 6 Dec 2017 11:43 am, MRAB wrote:
> A blank line could be a record if there's only one field and it's empty.
That's technically correct, but if you have only one field, its barely a CSV
file at all.
Given that CSV technically requires at least two fields (in order to have a
separator bet
On Wed, 6 Dec 2017 11:54 am, John Pote wrote:
[...]
> Ran above test file and got,
> >>python36 compiletest.py
> at 0x02120E40, file "", line 1>
>
>
> SPAM scrambled
Thanks everyone, that's what I wanted to see.
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered
Anyone got a handy copy of Python 3.6 available to test something for me?
What does compile('f"{spam} {eggs}"', '', 'single') return?
What does eval()'ing the above compiled object do? If necessary, you may have
to define spam and eggs first.
Thanks in advance.
--
Steve
“Cheer up,” they said
On Wed, 6 Dec 2017 04:20 am, Jason wrote:
> I ran into this:
>
https://stackoverflow.com/questions/27707581/why-does-csv-dictreader-skip-empty-lines
>
> # unlike the basic reader, we prefer not to return blanks,
> # because we will typically wind up with a dict full of None
> # values
>
> while
On Tue, 5 Dec 2017 07:58 pm, Lawrence D’Oliveiro wrote:
> On Tuesday, December 5, 2017 at 3:39:26 AM UTC+13, Rick Johnson wrote:
>>
>> Sounds like your OS file associations are all botched-up ...
>
> Linux doesn’t do “OS file associations”.
Then how does my Linux box know that when I double-cl
On Tue, 5 Dec 2017 11:31 pm, Rick Johnson wrote:
> Ned Batchelder wrote:
> [...]
>> Your original statement sounded like, "The else clause can
>> never be executed,"
>
> No. Of course not. Note that i mentioned _pragmatism_. My
> complaint about the else-clause was not that it could
> _never_ be
On Wed, 8 Nov 2017 04:28 am, Ian Kelly wrote:
> Steve's manufactured interactive example ("manufactured" because
> who really uses for-else interactively? If I really care that much
> about output formatting I'm going to put it in a script).
Me. As I have said.
I really don't appreciate you imp
On Mon, 6 Nov 2017 12:39 am, Paul Moore wrote:
> On 5 November 2017 at 01:22, Steve D'Aprano
> wrote:
>> On Sun, 5 Nov 2017 04:32 am, Steve D'Aprano wrote:
>>
>>> I'm trying to dump a Firefox IndexDB sqlite file to text using Python 3.5.
>>&g
On Sat, 4 Nov 2017 03:57 pm, Michael Torrie wrote:
> On 11/03/2017 09:06 PM, Chris Angelico wrote:
>> On Sat, Nov 4, 2017 at 1:57 PM, Michael Torrie wrote:
>>> On 11/03/2017 07:09 PM, Steve D'Aprano wrote:
>>>> On Sat, 4 Nov 2017 06:15 am, Michael Torrie wrote
On Mon, 6 Nov 2017 01:39 am, Jon Ribbens wrote:
> On 2017-11-05, Steve D'Aprano wrote:
>> On Sat, 4 Nov 2017 04:44 am, Jon Ribbens wrote:
>>> That conforms to my model. It's searching for the condition
>>> 'count > MAX_OBJECTS'.
>>
>&g
On Mon, 6 Nov 2017 10:06 am, Jon Ribbens wrote:
> On 2017-11-05, Ben Finney wrote:
>> Jon Ribbens writes:
>>> I've provided you with a way of thinking about 'for...else' that makes
>>> its purpose and meaning intuitively obvious.
>>
>> I've read that sentence several times, and I still can't mak
On Mon, 6 Nov 2017 12:54 am, Stefan Ram wrote:
> Paul Moore writes:
>>But regardless, the Zen isn't intended to be taken quite as literally
>>as the OP was trying to do. It's a statement of principles, not a set
>>of rules.
>
> What I am looking for is a default notation to use in my
> begin
On Sun, 5 Nov 2017 09:53 pm, Karsten Hilbert wrote:
> On Sun, Nov 05, 2017 at 11:28:44AM +1100, Steve D'Aprano wrote:
>
>> > Try in an interactive interpreter:
>> >
>> >python> "a string" is True
>>
>> Did you try that
On Sun, 5 Nov 2017 12:49 pm, Ben Finney wrote:
> Steve D'Aprano writes:
>
>> On Sun, 5 Nov 2017 06:42 am, Stefan Ram wrote:
>>
>> > What is the one way to do it?
>>
>> There is no philosophy of "one way to do it" in Python, that is a
>&g
On Sat, 4 Nov 2017 04:44 am, Jon Ribbens wrote:
> On 2017-11-03, Steve D'Aprano wrote:
>> The for loop does not necessarily perform a search:
>>
>> count = 1
>> for obj in sequence:
>> if count > MAX_OBJECTS:
>> print("too many ob
On Sun, 5 Nov 2017 04:32 am, Steve D'Aprano wrote:
> I'm trying to dump a Firefox IndexDB sqlite file to text using Python 3.5.
>
>
> import sqlite3
> con = sqlite3.connect('foo.sqlite')
> with open('dump.sql', 'w') as f:
> for l
On Sun, 5 Nov 2017 06:42 am, Stefan Ram wrote:
> What is the one way to do it?
There is no philosophy of "one way to do it" in Python, that is a
misunderstanding (possibly deliberate...) spread about by Perl users, to
contrast Python from Perl's "more than one way to do it".
The Zen of Python sa
On Sun, 5 Nov 2017 03:07 am, Karsten Hilbert wrote:
> Try in an interactive interpreter:
>
>python> "a string" is True
Did you try that yourself?
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, things got worse.
--
https://mail.python.org/mailm
I'm trying to dump a Firefox IndexDB sqlite file to text using Python 3.5.
import sqlite3
con = sqlite3.connect('foo.sqlite')
with open('dump.sql', 'w') as f:
for line in con.iterdump():
f.write(line + '\n')
The error I get is:
Traceback (most recent call last):
File "", line 2,
On Sun, 5 Nov 2017 02:31 am, brandon wallace wrote:
>
> I have this code that tests a server to see if it is listening on port 123
> runs and evaluates to True every time. Even if the server does not exist but
> it is not supposed to do that. I am getting no error message at all. What is
> going
On Sat, 4 Nov 2017 05:12 am, Israel Brewster wrote:
[...]
>> People generally understand how to move data around, and the mistakes are
>> usually pretty obvious when they happen.
>
> I think the existence of this thread indicates otherwise :-) This mistake
> was far from obvious, and clearly I di
On Sat, 4 Nov 2017 06:15 am, Michael Torrie wrote:
> In fact if you have no break you may as well drop the
> else entirely, because the block will always execute.
That's incorrect. There are multiple ways to exit a loop that will prevent the
`else` block from executing, `break` is only one.
--
On Fri, 3 Nov 2017 10:49 pm, Jon Ribbens wrote:
> On 2017-11-03, Steve D'Aprano wrote:
>> On Fri, 3 Nov 2017 03:31 am, Jon Ribbens wrote:
>>> No, it's an obvious bug. You have a 'for...else' with no 'break'.
>>> Like I said, that should p
On Sat, 4 Nov 2017 01:50 am, Chris Angelico wrote:
> On Fri, Nov 3, 2017 at 10:26 PM, Rhodri James wrote:
>> I'm with Steven. To be fair, the danger with threads is that most people
>> don't understand thread-safety, and in particular don't understand either
>> that they have a responsibility t
On Fri, 3 Nov 2017 09:13 pm, Serhiy Storchaka wrote:
> What the interpreter or configuration do you use? The standard
> interpreter uses '>>> ' as a prompt.
I have this in my Python startup file:
if (sys.version_info[0] >= 3 and os.name == 'posix'
and os.environ['TERM'] in ['xterm', 'vt1
On Fri, 3 Nov 2017 04:22 pm, Paul Rubin wrote:
> Steve D'Aprano writes:
>> for x in something():
>> print(x, end='')
>
> print(''.join(something()))
I hoped that people would recognise a simplified, toy example used only to
illustrate a tec
On Fri, 3 Nov 2017 02:32 pm, Stefan Ram wrote:
> Here is an excerpt from a text from Edward E. Lee:
>
> A part of the Ptolemy Project experiment was to see
> whether effective software engineering practices could be
> developed for an academic research setting.
[...]
> No problems were observed
On Fri, 3 Nov 2017 02:19 pm, Rustom Mody wrote:
> «The world is concurrent» [Joe Armstrong creator of Erlang]
And the world is extremely complex, complicated and hard to understand.
The point of programming is to simplify the world, not emulate it in its full
complexity.
--
Steve
“Cheer up,
On Fri, 3 Nov 2017 03:31 am, Jon Ribbens wrote:
> On 2017-11-02, Steve D'Aprano wrote:
>> On Fri, 3 Nov 2017 12:39 am, Jon Ribbens wrote:
>>> Why would we want to make the language worse? It is fairly obvious
>>> what 'else' means,
>>
>>
On Fri, 3 Nov 2017 07:24 am, Chris Angelico wrote:
> On Fri, Nov 3, 2017 at 3:27 AM, Israel Brewster
> wrote:
>>
>> Actually, that saying is about regular expressions, not threads :-) . In
>> the end, threads are as good a way as handling concurrency as any other,
>> and simpler than many. They h
On Fri, 3 Nov 2017 09:20 am, Terry Reedy wrote:
> This seems like a bug in how Python interacts with your console. On
> Windows, in Python started from an icon or in Command Prompt:
>
> >>> for c in 'abc': print(c, end='')
> ...
> abc>>>
That's still unfortunate: the prompt is immediately afte
On Fri, 3 Nov 2017 12:39 am, Jon Ribbens wrote:
> On 2017-11-01, Alexey Muranov wrote:
>> what do you think about the idea of replacing "`else`" with "`then`" in
>> the contexts of `for` and `try`?
>>
>> It seems clear that it should be rather "then" than "else." Compare
>> also "try ... then ..
On Thu, 2 Nov 2017 10:45 pm, Alberto Berti wrote:
>>>>>> "Steve" == Steve D'Aprano writes:
>
> py> for x in "abcdefgh":
> Steve> ... print(x, end='')
> Steve> ...
> py> efghpy>
>
>
&g
On Thu, 2 Nov 2017 10:09 pm, Ben Bacarisse wrote:
> Sure, but your argument seemed to that else has entirely the wrong
> meaning (I certainly to a double take when I have to remember what it
> means) and, in that context, finally has a meaning closer to what you
> want.
That's an argument about w
On Thu, 2 Nov 2017 09:04 pm, Steve D'Aprano wrote:
> then (with special case) of `pass`
That should read "then except for the special case of `pass`".
Sorry.
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, things got
Occasionally it is useful to loop over a bunch of stuff in the interactive
interpreter, printing them as you go on a single line:
for x in something():
print(x, end='')
If you do that, the prompt overwrites your output, and you get a mess:
py> for x in "abcdefgh":
... print(x, end='')
.
On Thu, 2 Nov 2017 12:49 pm, Skip Montanaro wrote:
> I don't know. The word "then" doesn't connote different ways of exiting a
> loop to me ("else" doesn't really either, I will grant you that, but it's
> what we have). Here's how I would read things:
>
>- *while* some condition holds, execut
On Thu, 2 Nov 2017 10:13 am, Jason Maldonis wrote:
> Hi everyone,
>
> I want to use a metaclass to override how class instantiation works. I've
> done something analogous to using the Singleton metaclass from the Python3
> Cookbook example.
In my opinion, nine times out of ten, using a metaclass
On Thu, 2 Nov 2017 12:50 pm, Ben Bacarisse wrote:
> Steve D'Aprano writes:
>
>> On Thu, 2 Nov 2017 08:12 am, Alexey Muranov wrote:
>>
>>> what do you think about the idea of replacing "`else`" with "`then`" in
>>> the contexts of `
On Thu, 2 Nov 2017 08:23 am, Ned Batchelder wrote:
> Apart from the questions of backward compatibility etc (Python is
> unlikely to ever go through another shift like the 2/3 breakage), are
> you sure "then" is what you mean? This won't print "end":
>
> for i in range(10):
> print(i)
> e
On Thu, 2 Nov 2017 08:21 am, Chris Angelico wrote:
> With the 'for' loop,
> it's a bit more arguable, but I've never seen anything more than a
> weak argument in favour of 'then'
Thhpptpt!
"else" is an completely inappropriate term that doesn't describe the semantics
of the statement even a litt
On Thu, 2 Nov 2017 08:02 am, Ben Bacarisse wrote:
> r...@zedat.fu-berlin.de (Stefan Ram) writes:
>
>> Wolfgang Maier writes:
>>>If you're worried bout having things on separate lines, you could write:
>>>import os; os.getcwd()
>>>,etc., which is actually saving a few characters :)
>>
>> Yes, b
On Thu, 2 Nov 2017 05:57 am, Stefan Ram wrote:
> I also have heard that there was a module cache, so I
> was hoping that a second import of the same module might
> not be such an effort for the implementation.
There is: sys.modules.
Although `import spam` is cheap when spam is in the cache, its
On Thu, 2 Nov 2017 08:12 am, Alexey Muranov wrote:
> Hello,
>
> what do you think about the idea of replacing "`else`" with "`then`" in
> the contexts of `for` and `try`?
Yes, this, exactly!!!
(For while and for loops, but not try -- see below.)
I have argued this for many years. The current
On Thu, 2 Nov 2017 05:53 am, Israel Brewster wrote:
[...]
> So the end result is that the thread that "updates" the dictionary, and the
> thread that initially *populates* the dictionary are actually running in
> different processes.
If they are in different processes, that would explain why the
On Thu, 2 Nov 2017 04:25 am, Stefan Ram wrote:
> I started to collect some code snippets:
[...]
> __import__( "random" ).random()
>
> And so on. You get the idea.
>
> However, reportedly, all those snippets are anti-patterns
> because they use »__import__«.
Correct. Nearly all dunder fun
On Mon, 30 Oct 2017 09:10 pm, Kirill Balunov wrote:
> Sometime ago I asked this question at SO [1], and among the responses
> received was paragraph:
>
> - `zip` re-uses the returned `tuple` if it has a reference count of 1 when
> the `__next__` call is made.
> - `map` build a new `tuple` that
On Wed, 1 Nov 2017 02:29 am, Neil Cerutti wrote:
> You can use the % operator instead of +, and a generator
> expression instead of map. It's a pretty small improvement,
> though.
>
> values = '||%s||' % ('||'.join(str(s) for s in value_list))
>
> At least... I THINK you can use that generator e
On Tue, 31 Oct 2017 02:26 pm, Rustom Mody wrote:
> My own feeling about lisp-macros is conflicted:
> - They are likely the most unique feature of lisp, putting it at the top of
> the blub-language tower
> - They are the single reason Lisp can never succeed like mainstream
> languages: Any signific
On Tue, 31 Oct 2017 02:34 pm, Chris Angelico wrote:
> On Tue, Oct 31, 2017 at 2:00 PM, Steve D'Aprano
> wrote:
>> Python has no GOTO, fortunately, but C has at least two, GOTO and LONGJMP.
>> A C macro could, if I understand correctly, jump into the middle of anothe
On Tue, 31 Oct 2017 01:06 pm, Alberto Riva wrote:
> On 10/30/2017 10:27 AM, Rhodri James wrote:
[...]
>> You can do the same in C. I've had the displeasure of trying to
>> maintain such code. It was near-unreadable, because it constantly broke
>> your expectations of what the code flow *could* b
On Mon, 30 Oct 2017 01:20 pm, Ho Yeung Lee wrote:
from Crypto.Cipher import AES
key = 'mysecretpassword'
plaintext = 'Secret Message A'
encobj = AES.new(key, AES.MODE_ECB)
ciphertext = encobj.encrypt("hello")
> Traceback (most recent call last):
> File "", line 1, i
On Mon, 30 Oct 2017 06:09 am, Alberto Riva wrote:
> But that's exactly why I would like to be able to use macros. I think
> that being able to write "return if this happens" is much more explicit
> than having to write the full if statement, every time.
There have been proposals in the past for s
On Mon, 30 Oct 2017 02:35 am, Stefan Ram wrote:
> So, I guess, we then must accept that sometimes - under
> extraordinary circumstances - it should be tolerated to
> write a function that is as long as six lines.
An entire six lines... you cowboy!
*wink*
--
Steve
“Cheer up,” they said,
On Mon, 30 Oct 2017 03:35 am, Alberto Riva wrote:
> On 10/29/2017 10:35 AM, Steve D'Aprano wrote:
[...]
>> You mean *less* explicit. "checkKey" gives absolutely no hint that it
>> causes the current function to return.
>
> That's just because I used a n
On Mon, 30 Oct 2017 01:18 am, Alberto Riva wrote:
> Hello,
>
> I'm wondering if there is a way of writing a function that causes a
> return from the function that called it. To explain with an example,
> let's say that I want to exit my function if a dict does not contain a
> given key. I could w
On Sun, 29 Oct 2017 01:56 pm, Stefan Ram wrote:
> If the entropy of an individual message is not defined,
> than it is still available to be defined. I define it
> to be log2(1/p), where p is the probability of this
> message. I also choose a unit for it, which I call "bit".
That is exact
On Sun, 29 Oct 2017 06:03 pm, Chris Angelico wrote:
> On Sun, Oct 29, 2017 at 6:00 PM, Ian Kelly wrote:
>> On Oct 28, 2017 5:53 PM, "Chris Angelico" wrote:
>>> One bit. It might send the message, or it might NOT send the message.
>>
>> Not sending the message is equivalent to having a second pos
On Sun, 29 Oct 2017 02:31 pm, Gregory Ewing wrote:
> Steve D'Aprano wrote:
>> I don't think that's right. The entropy of a single message is a
>> well-defined quantity, formally called the self-information.
>>
>> https://en.wikipedia.org/wiki/Self-info
On Sun, 29 Oct 2017 07:03 am, Peter Pearson wrote:
> On Thu, 26 Oct 2017 19:26:11 -0600, Ian Kelly wrote:
>>
>> . . . Shannon entropy is correctly calculated for a data source,
>> not an individual message . . .
>
> Thank you; I was about to make the same observation. When
> people talk about t
On Fri, 27 Oct 2017 09:53 am, Ben Bacarisse wrote:
> A source of random can be defined but "random data" is much more
> illusive.
Random data = any set of data generated by "a source of random".
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, thing
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