On 10/10/2017 08:44, Sayth Renshaw wrote:
>
>>> Hi
>>>
>>> How do I create a valid file name and directory with pathlib?
>>>
>>> When I create it using PurePosixPath I end up with an OSError due to an
>>> obvously invlaid path being created.
>>
>> You're on Windows. The rules for POSIX paths don'
On 05/11/2022 22:11, MRAB wrote:
On 2022-11-05 18:52, cactus wrote:
On Saturday, 5 November 2022 at 16:06:52 UTC, cactus wrote:
I should have quoted the full comprehensions:
all((srt(m, n) in c_np) == (srt(a, b) in c_ap) for (m, a), (n, b)
in combinations(na8, 2))
all( srt(m, n) in c_np
I am wondering whether I have misunderstood the semantics of os.path
relpath or whether it has a bug.
Here is a short test program:
---
from os.path import relpath, split
src_path = 'C:\\lib\\src\\'
vcx_path = 'C:\\build.vs22\\lib\\li
On 26/05/2023 16:42, Eryk Sun wrote:
On 5/26/23, cactus wrote:
Surprisingly (for me at least) the alternative provided by the pathlib
module 'relative_to' method doesn't provide for full relative path
computation. I was expecting this would offer everything that os.path
offers but it doesn't
The pop() method exists for five mainstream data items and shows a range
of different behaviours for each of them.
But, of the five, pop for dictionaries is the only one for which the
first parameter is required and this makes d.pop() for dictionaries an
error rather than doing something usefu
On 14/06/2021 08:29, Greg Ewing wrote:
On 14/06/21 4:19 am, BlindAnagram wrote:
Am I missing the obvious way to obtain the value (or the key) from a
dictionary that is known to hold only one item?
v = d.popitem()[1]
Thanks, Greg, I missed that.
More importantly, is there a good reason why
On 14/06/2021 20:43, Chris Angelico wrote:
On Tue, Jun 15, 2021 at 5:41 AM BlindAnagram wrote:
However, d.pop(key, [default]) returns the value (or the default) and
consistency with other pops (a good thing in my view) would suggest that
d.pop() could return a random value, which would serve
On 15/06/2021 00:11, dn wrote:
On 15/06/2021 09.18, BlindAnagram wrote:
On 14/06/2021 20:43, Chris Angelico wrote:
On Tue, Jun 15, 2021 at 5:41 AM BlindAnagram
...
No it isn't hard to use popitem() but it evidently proved hard for me to
remember that it was there.
If that's
On 15/06/2021 01:36, Terry Reedy wrote:
On 6/14/2021 5:18 PM, BlindAnagram wrote:
I believe that consistency in how methods common to different types
work is useful since it adds to the coherence of the language as a
whole and avoids the need to remember special cases.
Each collection class
Is there any difference in performance between these two program layouts:
def a():
...
def(b):
c = a(b)
or
def(b):
def a():
...
c = a(b)
I would appreciate any insights on which layout to choose in which
circumstances.
--
https://mail.python.org/mailman/l
On 10/02/2022 15:20, Chris Angelico wrote:
On Fri, 11 Feb 2022 at 02:13, BlindAnagram wrote:
Is there any difference in performance between these two program layouts:
def a():
...
def(b):
c = a(b)
or
def(b):
def a():
...
c = a(b)
I would
On 10/02/2022 16:52, Rob Cliffe wrote:
On 10/02/2022 12:13, BlindAnagram wrote:
Is there any difference in performance between these two program layouts:
def a():
...
def(b):
c = a(b)
or
def(b):
def a():
...
c = a(b)
I would appreciate any insights on
Hi Jim,
In my comment/solution for this Enigma I tried to post a link to my
number theory library but my HTML got removed.
Could you please replace the first sentence with:
A solution using my http://173.254.28.24/~brgladma/number_theory.py";>number theory
library:
(without the line wrapping).
Now that Python 3.7 has reached release candidate status, I thought that
I should try it. But I use Matplotlib a lot and this fails to install
with Python 3.7 because "freetype and png cannot be installed" (I am
using Windows 10).
I am wondering if anyone knows how to work around this issue?
I l
In Python 3.7.0 on Windows the help file (python370.chm) displays with a
fixed line length and does not adjust its line length when the user
expands the help window horizontally. This behaviour is different to
that of the Python 3.6 help file (python360.chm) which adjusts its text
to fit the horiz
On 29/06/2018 17:53, Terry Reedy wrote:
> On 6/29/2018 6:14 AM, BlindAnagram wrote:
>> In Python 3.7.0 on Windows the help file (python370.chm) displays with a
>> fixed line length and does not adjust its line length when the user
>> expands the help window horizontall
On 30/06/2018 10:43, Steven D'Aprano wrote:
> On Fri, 29 Jun 2018 12:53:15 -0400, Terry Reedy wrote:
>
>> On 6/29/2018 6:14 AM, BlindAnagram wrote:
>>> In Python 3.7.0 on Windows the help file (python370.chm) displays with
>>> a fixed line length and does not a
On 03/07/2018 03:41, Terry Reedy wrote:
> On 7/2/2018 8:57 PM, Steven D'Aprano wrote:
>> On Fri, 29 Jun 2018 12:53:15 -0400, Terry Reedy wrote:
>>
>>> On 6/29/2018 6:14 AM, BlindAnagram wrote:
>>>> In Python 3.7.0 on Windows the help file (python370.chm) d
On 13/04/2016 08:41, martin.spic...@gmail.com wrote:
> Hi,
>
> there may be a serious error in python's int() function:
>
> print int(float(2.8/0.1))
>
> yields
>
> 27
>
> instead of 28!!
>
> I am using Python Python 2.7.6, GCC 4.8.2 on Linux Ubuntu.
>
> Is that known?
This arises because f
On 14/04/2016 07:52, ast wrote:
>
> a écrit dans le message de
> news:52f7516c-8601-4252-ab16-bc30c59c8...@googlegroups.com...
>> Hi,
>>
>> there may be a serious error in python's int() function:
>>
>> print int(float(2.8/0.1))
>>
>> yields
>>
>> 27
>>
>> instead of 28!!
>>
>> I am using Python
On 14/04/2016 08:59, blindanag...@nowhere.net wrote:
> On 14/04/2016 07:52, ast wrote:
> This means that the result will be correct provided it has 53 or less
> bits - just short of 16 decimal digits (i.e for square numbers with less
> than 32 digits).
>
> With an integer square root function (is
On 14/04/2016 09:13, blindanag...@nowhere.net wrote:
> On 14/04/2016 08:59, blindanag...@nowhere.net wrote:
>> On 14/04/2016 07:52, ast wrote:
>
>> This means that the result will be correct provided it has 53 or less
>> bits - just short of 16 decimal digits (i.e for square numbers with less
>> t
On 15/04/2016 01:36, Dennis Lee Bieber wrote:
> On Thu, 14 Apr 2016 13:07:03 +0100, blindanag...@nowhere.net declaimed the
> following:
>
>> On 14/04/2016 09:13, blindanag...@nowhere.net wrote:
>>> On 14/04/2016 08:59, blindanag...@nowhere.net wrote:
On 14/04/2016 07:52, ast wrote:
>>>
T
On 15/12/2018 09:56, jf...@ms4.hinet.net wrote:
> Appreciate your thoughtfully analysis on this code. Before generalize it with
> arbitrary additions, as Peter suggested:-), a recursive version is needed. I
> may give it a try on this Sunday.
>
>
> Avi Gross at 2018/12/15 UTC+8 AM8:13:37 wrote:
On 14/12/2018 02:24, jf...@ms4.hinet.net wrote:
> Just for fun:-) On my ooold PC, it takes 0.047 seconds to run the following
> algorithm on the problem 'SNED + MORE == MONEY".
>
> -
> import time
> import itertools
>
> #S, E, N, D, M, O, R, Y
> n = 0
> digits = {x fo
On 20/08/2019 13:00, Sayth Renshaw wrote:
> Hi
>
> I want to do basic math with a list.
>
>
> for idx, num in enumerate(a):
> print(idx, num)
>
> This works, but say I want to print the item value at the next index as well
> as the current.
>
> for idx, num in enumerate(a):
> print(
I would appreciate advice on whether it is possible to avoid the use of
a global variable used in a function by encapsulating it in a class
without maaking any changes to the call interface (which I cannot change).
I have:
seen = dict()
def get_it(piece):
...
return seen[p
On 25/02/2020 12:56, Chris Angelico wrote:
> On Tue, Feb 25, 2020 at 11:41 PM BlindAnagram
> wrote:
>>
>> I would appreciate advice on whether it is possible to avoid the use of
>> a global variable used in a function by encapsulating it in a class
>> without m
On 25/02/2020 12:50, Musbur wrote:
>
> Am 25.02.2020 13:38 schrieb BlindAnagram:
>> and I am wondering if it is possible to use a class something like
>>
>> class get_it(object):
>>
>> seen = dict()
>>
>> def __call__(piece):
>> r
On 25/02/2020 14:14, Rhodri James wrote:
> On 25/02/2020 12:38, BlindAnagram wrote:
>> I would appreciate advice on whether it is possible to avoid the use of
>> a global variable used in a function by encapsulating it in a class
>> without maaking any changes to the call inte
On 25/02/2020 14:13, Chris Angelico wrote:
> On Wed, Feb 26, 2020 at 12:11 AM BlindAnagram
> wrote:
>>
>> On 25/02/2020 12:56, Chris Angelico wrote:
>>> On Tue, Feb 25, 2020 at 11:41 PM BlindAnagram
>>> wrote:
>>>>
>>>> I would app
On 25/02/2020 14:14, Rhodri James wrote:
> On 25/02/2020 12:38, BlindAnagram wrote:
>> I would appreciate advice on whether it is possible to avoid the use of
>> a global variable used in a function by encapsulating it in a class
>> without maaking any changes to the call inte
On 25/02/2020 16:36, Rhodri James wrote:
> On 25/02/2020 15:20, BlindAnagram wrote:
>>> class GetIt:
>>> seen = dict()
>>>
>>> def __call__(self, piece):
>>> return GetIt.seen[piece]
>>>
>>> get_it = GetIt()
>>>
On 25/02/2020 17:16, Christman, Roger Graydon wrote:
>> On Tue, 25 Feb 2020 3:06 PM BlindAnagram wrote:
>
>> My interest in this stems from wanting to keep the dictionary only
>> available to the function that uses it and also a worry about being
>> called from thread
I came across an issue that I am wondering whether I should report as an
issue. If I have a directory, say:
base='C:\\Documents'
and I use os.path.join() as follows:
join(base, '..\\..\\', 'build', '')
I obtain as expected from the documentation:
'C:\\Documents\\..\\..\\build\\'
But if I
On 26/05/2020 16:22, Ben Bacarisse wrote:
> BlindAnagram writes:
>
>> I came across an issue that I am wondering whether I should report as an
>> issue. If I have a directory, say:
>>
>> base='C:\\Documents'
>>
>> and I use os.path.join
On 26/05/2020 16:25, Stefan Ram wrote:
> BlindAnagram writes:
>> The documentation says that an absolute path in the parameter list for
>> join will discard all previous parameters but '\\' is not an absoute path!
>
> The source code for "join" in &
On 26/05/2020 16:59, Mats Wichmann wrote:
> On 5/26/20 8:56 AM, BlindAnagram wrote:
>> I came across an issue that I am wondering whether I should report as an
>> issue. If I have a directory, say:
>>
>> base='C:\\Documents'
>>
>> and I
On 26/05/2020 17:09, Stefan Ram wrote:
> Mats Wichmann writes:
>> an absolute path is one that starts with the pathname separator.
>
> The Python Library Reference does not use the term
> "pathname separator". It uses "directory separator"
> (os.sep) and "filename separator" ('/' on Unix).
On 26/05/2020 17:46, MRAB wrote:
> On 2020-05-26 16:48, BlindAnagram wrote:
>> On 26/05/2020 16:22, Ben Bacarisse wrote:
>>> BlindAnagram writes:
>>>
>>>> I came across an issue that I am wondering whether I should report
>>>> as an
>>&
On 26/05/2020 16:59, Mats Wichmann wrote:
> On 5/26/20 8:56 AM, BlindAnagram wrote:
>> I came across an issue that I am wondering whether I should report as an
>> issue. If I have a directory, say:
>>
>> base='C:\\Documents'
>>
>> and I
On 26/05/2020 18:51, Mats Wichmann wrote:
> On 5/26/20 10:57 AM, BlindAnagram wrote:
>> On 26/05/2020 16:59, Mats Wichmann wrote:
>>> On 5/26/20 8:56 AM, BlindAnagram wrote:
>>>> I came across an issue that I am wondering whether I should report as an
>>&
On 27/05/2020 09:13, Barry Scott wrote:
>
>
>> On 26 May 2020, at 18:01, BlindAnagram wrote:
>>
>> On 26/05/2020 17:09, Stefan Ram wrote:
>>> Mats Wichmann writes:
>>>> an absolute path is one that starts with the pathname separator.
>>>
&
On 27/05/2020 13:30, Ben Bacarisse wrote:
> BlindAnagram writes:
>
>> The issue that I raised here was whether the behaviour of os.path.join()
>> in treating the Windows directory separator '\\' as an absolute path
>> should be considered a bug.
>
> Y
On 27/05/2020 14:53, Rhodri James wrote:
> On 27/05/2020 14:41, BlindAnagram wrote:
>> That is true if you know for sure how your path will be used.
>>
>> But if you don't, there is a world of difference between passing the
>> paths 'name' and 'name
On 27/05/2020 16:49, Rhodri James wrote:
> On 27/05/2020 16:12, BlindAnagram wrote:
>> I'm sorry that you don't believe me but all I know is how I intend the
>> path to be used. And the os.path functions aren't helpful here when
>> they actually_chang
On 27/05/2020 16:53, Ben Bacarisse wrote:
> BlindAnagram writes:
>
>> On 27/05/2020 13:30, Ben Bacarisse wrote:
>>> BlindAnagram writes:
>>>
>>>> The issue that I raised here was whether the behaviour of os.path.join()
>>>> in treating th
On 27/05/2020 18:37, Roel Schroeven wrote:
> BlindAnagram schreef op 27/05/2020 om 18:39:
>> On 27/05/2020 16:49, Rhodri James wrote:
>>> On 27/05/2020 16:12, BlindAnagram wrote:
>>>> I'm sorry that you don't believe me but all I know is how I intend th
On 27/05/2020 18:42, Roel Schroeven wrote:
> BlindAnagram schreef op 27/05/2020 om 18:53:
>> Its not my bug to fix - the semantics of what I send is very clear on
>> any Windows system.
>
> That's the first time I see any mention of those semantics, and I've
> be
On 27/05/2020 23:39, Roel Schroeven wrote:
> BlindAnagram schreef op 27/05/2020 om 22:55:
>> On 27/05/2020 18:42, Roel Schroeven wrote:
>>> BlindAnagram schreef op 27/05/2020 om 18:53:
>>>> Its not my bug to fix - the semantics of what I send is very cl
On 28/05/2020 14:51, Eryk Sun wrote:
> On 5/27/20, Chris Angelico wrote:
>> On Thu, May 28, 2020 at 7:07 AM BlindAnagram
>> wrote:
>>> You can define a path however you want but it won't change the fact that
>>> on Windows a path that ends in &#
On 27/05/2020 23:39, Roel Schroeven wrote:
> I find no hints of adding a backslash at the end to indicate directories.
>
> If you can point me to convincing evidence in the documentation I'll
> change my mind.
See the post from Eryk Sun, later in this thread.
--
https://mail.python.org/mailman/
On 10/02/2016 23:05, Mike S wrote:
> On 2/10/2016 5:05 AM, Mark Lawrence wrote:
[snip]
>>> Have you seen this?
>>> http://www.davidbaumgold.com/tutorials/set-up-python-windows/
>>>
>>
>> I have now, but I'm perfectly happy with the free versions of Visual
>> Studio.
[snip]
> I don't see any refer
With:
l = [1,2,3]
this:
print('{0[0]:d}..{0[2]:d}'.format(l))
gives 1..3 but this:
print('{0[0]:d}..{0[-1]:d}'.format(l))
gives:
Traceback (most recent call last):
File "", line 1, in
builtins.TypeError: list indices must be integers, not str
which seems to me counterint
On 11/04/2014 22:33, blindanagram wrote:
Thanks, Mark and Terry, for your rapid responses.
An interesting thread.
Brian
--
https://mail.python.org/mailman/listinfo/python-list
On 24/05/2014 08:13, wxjmfa...@gmail.com wrote:
> Le vendredi 23 mai 2014 22:16:10 UTC+2, Mark Lawrence a écrit :
>> An article by Brett Cannon that I thought might be of interest
>>
>> http://nothingbutsnark.svbtle.com/my-view-on-the-current-state-of-python-3
>>
>>
>>
>> --
>>
>> My fellow Pytho
Hi Jim,
When you get a moment, can you please remove the wrongly formatted
Python comment I made on your site?
Thanks
Brian
--
https://mail.python.org/mailman/listinfo/python-list
On 10/09/2014 07:05, Steven D'Aprano wrote:
> blindanagram wrote:
>
>> Hi Jim,
>>
>> When you get a moment, can you please remove the wrongly formatted
>> Python comment I made on your site?
>>
>> Thanks
>>
>> Brian
>
> Who
What is the rationale for gcd(x, y) in Fractions returning a negative
value when y is negtive?
For example gcd(3, -7) returns -1, which means that a co-prime test that
would work in many other languages 'if gcd(x, y) == 1' will fail in
Python for negative y.
And, of course, since -|x| is less tha
On 23/09/2014 12:53, Wolfgang Maier wrote:
> On 09/23/2014 10:16 AM, blindanagram wrote:
>> What is the rationale for gcd(x, y) in Fractions returning a negative
>> value when y is negtive?
>>
>
> I guess it is implemented this way because its main use is in the
>
On 23/09/2014 13:50, Steven D'Aprano wrote:
> blindanagram wrote:
>
>> What is the rationale for gcd(x, y) in Fractions returning a negative
>> value when y is negtive?
>
> Good question.
>
> Normally, gcd is only defined for non-negative integers. Wolfra
On 23/09/2014 18:20, Ian Kelly wrote:
> On Tue, Sep 23, 2014 at 10:38 AM, Wolfgang Maier
> wrote:
>> Maybe fractions.gcd could be renamed, but be wrapped or reimplemented
>> correctly somewhere else in the stdlib or even in fractions ?
>
> +1
>
> I don't think the math module as suggested upthre
On 23/09/2014 18:26, Stefan Behnel wrote:
> Wolfgang Maier schrieb am 23.09.2014 um 18:38:
>> While at first I thought this to be a rather irrelevant debate over module
>> private vs public naming conventions, I now think the OP is probably right
>> and renaming fractions.gcd to fractions._gcd may
On 23/09/2014 18:55, Stefan Behnel wrote:
> blindanagram schrieb am 23.09.2014 um 19:43:
>> On 23/09/2014 18:26, Stefan Behnel wrote:
>>> Wolfgang Maier schrieb am 23.09.2014 um 18:38:
>>>> While at first I thought this to be a rather irrelevant debate over module
On 23/09/2014 20:30, Mark Lawrence wrote:
> On 23/09/2014 18:43, blindanagram wrote:
>> On 23/09/2014 18:26, Stefan Behnel wrote:
>>> Wolfgang Maier schrieb am 23.09.2014 um 18:38:
>>>> While at first I thought this to be a rather irrelevant debate over
>>>
On 24/09/2014 12:44, Steven D'Aprano wrote:
> blindanagram wrote:
[snip]
> - Mathworld says that GCD of two negative numbers is a negative number;
>
> - but Mathematica says that GCD of two negative numbers is a positive;
>
> - Wikipedia agrees with Mathematica and d
On 24/09/2014 17:13, Stefan Behnel wrote:
> blindanagram schrieb am 24.09.2014 um 15:25:
>> On 24/09/2014 12:44, Steven D'Aprano wrote:
[snip]
> We have an open tracker ticket now on changing *something* about the
> current situation. Let's just add some new functional
On 24/09/2014 17:34, Mark Lawrence wrote:
> On 24/09/2014 12:14, Mark Dickinson wrote:
>> Mark Lawrence yahoo.co.uk> writes:
>>> Somebody got there first http://bugs.python.org/issue22477
>>
>> I think there's good reason to suspect that Brian Gladman an
Hi Geoff
Are you snowed in?
Its OK here.
Brian
--
http://mail.python.org/mailman/listinfo/python-list
Hi Jim,
I woke up this morning realising that my published code for this
tantaliser is not very good.
I would hence be most grateful if you could substitute the attached version.
best regards,
Brian
from itertools import combinations, permutations, product
# enumerate the names
A, B,
On 19/05/2017 10:06, BlindAnagram wrote:
> Hi Jim,
>
> I woke up this morning realising that my published code for this
> tantaliser is not very good.
>
> I would hence be most grateful if you could substitute the attached version.
>
>best regards,
>
>
On 10/08/2017 15:28, 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
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