Re: [python-uk] C is it faster than numpy

[Edward Hartley]

Hi, 
Simply check the original Numpy aka Numerical Python docs where it’s 
comprehensively explained that the library is implemented in C with a thin 
Python wrapper. The docs were written circa ‘98 by the original library author. 
The library was optimised over a long period before being released. I’ve seen 
similar results when replacing an optimised Fortran library with C/C++ the key 
is the effort given to optimisation, and care with avoiding unnecessary memory 
allocation. 
I’ll dig out the reference when I’ve tracked it down.
Best of Luck
Ed Hartley

> On 25 Feb 2022, at 09:42, Giorgio Zoppi  wrote:
> 
> 
> Well,
> numpy is written in C :) Maybe your C is not the numpy equivalent?
> Best Regards,
> Giorgio
> 
>> Il giorno ven 25 feb 2022 alle ore 09:03 BELAHCENE Abdelkader 
>>  ha scritto:
>> Hi,
>> a lot of people think that C (or C++) is faster than python, yes I agree, 
>> but I think that's not the case with numpy, I believe numpy is faster than 
>> C, at least in some cases.
>> Is there another explanation ?
>> Or where can find  a doc speaking  about the subject?
>> Thanks a lot 
>> Regards
>> Numpy implements vectorization for arrays, or I'm wrong. Anyway here is an 
>> example Let's look at the following case:
>> Here is the result on my laptop i3:
>> 
>> Labs$ python3 tempsExe.py  5 
>>   sum with Python: 1250025000 and NumPy 1250025000
>>   time used Python Sum:  37.28 sec 
>>   time used  Numpy Sum:  1.85 sec
>> 
>> Labs$ ./tt5 
>> CPU  time :7.521730
>> The value : 1250025000 
>> 
>> 
>> This is the Python3 program :
>> 
>> import timeit as it
>> import numpy as np
>> import sys
>> try :
>> n=eval(sys.argv[1])
>> except:
>> print ("needs integer as argument") ; exit()
>> 
>> a=range(1,n+1)
>> b=np.array(a)
>> def func1(): return sum(a)
>> def func2(): return np.sum(b)
>> 
>> print(f"sum with Python: {func1()} and NumPy {func2()} ")
>> tm1=it.timeit(stmt=func1, number=n)
>> print(f"time used Python Sum: {round(tm1,2)} sec")
>> tm2=it.timeit(stmt=func2, number=n)
>> print(f"time used  Numpy Sum: {round(tm2,2)} sec")
>> 
>> and Here the C program:
>> #include 
>> #include 
>> #include 
>> long func1(int n){
>>  long  r=0;
>> for (int  i=1; i<= n;i++) r+= i;
>>  return r;
>> }
>> int main(int argc, char* argv[]){
>>  clock_t c0, c1; 
>> long v,count; int n;
>>if ( argc < 2) {
>>   printf("Please give an argument");
>>  return -1;
>>   }
>> n=atoi(argv[1]); 
>> c0 = clock();
>>  for (int j=0;j < n;j++) v=func1(n);
>>  c1 = clock();
>>  printf ("\tCPU  time :%.2f sec", (float)(c1 - c0)/CLOCKS_PER_SEC);
>>  printf("\n\tThe value : %ld\n",  v);
>> }
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> 
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Re: [python-uk] Your submission: A tour of data viz in Python

[Edward Hartley]

Hi 
I don’t think the entire mailing list needs to know all this.
Thanks 

> On 14 Aug 2019, at 12:37, "a.gra...@gmail.com"  wrote:
> 
> "Requests for free or reduced prices tickets were made via the financial 
> assistance programme which closed for applications shortly after the CfP."
> 
> My 2 cents: I see an issue here. A person will likely decide to attend or not 
> also depending if their talk/paper/poster is accepted or not. If you close 
> the financial aid right after the closure of CfP, people won't make it in 
> time to request it. Is this intentional?
> 
>> On Wed, 14 Aug 2019 at 12:33, Ann Barr  wrote:
>> Dear Élèonore
>> 
>> Requests for free or reduced prices tickets were made via the financial 
>> assistance programme which closed for applications shortly after the CfP. 
>> All allocations have now been made.
>> 
>> If you are purchasing your own ticket, you can order an individual ticket 
>> which offers a significant discount on the standard ticket price.
>>  
>> Kind Regards
>> Ann Barr
>> pyco...@uk.python.org
>> http://2019.pyconuk.org
>> https://twitter.com/PyConUK
>> 
>> 
>> -- 
>> PyCon UK Society Ltd. Company Number: 10073469. Registered in England and 
>> Wales.
>> Registered office: c/o Acconomy, Arena Business Centre, Holyrood Close, 
>> Poole BH17 7FJ, United Kingdom
>> 
>>> On 14 Aug 2019, at 10:11, 'Éléonore Mayola' via 2019 CFP Reviewers 
>>>  wrote:
>>> 
>>> Hi there,
>>> 
>>> Anyone checking this mailbox?
>>> I'd like to know if poster presenters have a reduced price for the 
>>> conference ticket.
>>> 
>>> Thank you,
>>> 
>>> Éléonore
>>> 
>>> 
>>> Sent with ProtonMail Secure Email.
>>> 
>>> ‐‐‐ Original Message ‐‐‐
 On Friday, 2 August 2019 15:50, Éléonore Mayola 
  wrote:
 
 Hi,
 
 Is a conference ticket provided for poster presenters or should I buy my 
 own ticket?
 
 Best regards,
 
 
 Éléonore
 
 
 Sent from ProtonMail mobile
 
 
 
  Original Message 
 On 2 Jul 2019, 11:23, PyCon UK 2019 < nore...@pretalx.com> wrote:
 
 
 Hi!
 We are delighted to tell you that we have accepted your submission "A tour 
 of data viz in Python" to PyCon UK 2019. Please click this link to confirm 
 your attendance:
 https://pretalx.com/pyconuk-2019/me/submissions/APBVXQ/confirm
 
 We look forward to seeing you at PyCon UK 2019 - Please contact us if you 
 have any questions! We will reach out again before the conference to tell 
 you details about your slot in the schedule and technical details 
 concerning the room and presentation tech.
 See you in Cardiff! The PyCon UK 2019 organisers
 
>>> 
>> 
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> 
> -- 
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> GitHub: https://github.com/andreagrandi
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Re: [python-uk] Announcing the Yorkshire Inquisition

[Edward Hartley]

> On 7 Dec 2016, at 13:36, Thomas Kluyver  wrote:
> 
>> On Wed, Dec 7, 2016, at 01:20 PM, Andy Robinson wrote:
>> To enforce good conduct in a suitably Pythonic manner, I  hereby
>> propose the foundation of the Yorkshire Inquisition, headed by Steve.
> 
> I don't think anybody expected that!
> 
>> Such an institution will have truly terrifying powers of enforcement.
>> Suggestions welcome on this thread
> 
> Give the inquisition the power to restrict someone's use of language
> features. For instance, in a relatively mild incident, the heretic may
> be banned from using for loops for a month, and have to emulate them
> using while instead.
And have to prove they are not a witch by showing they don't float when pitched 
into the Ouse?
> 
> Thomas
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Re: [python-uk] Volunteers wanted for an academic project

[Edward Hartley]

Hi,
If NLP is what you're after it may benefit you and the project to take a look 
at UCREL and license CLAWS http://ucrel.lancs.ac.uk/claws/. Also look at 
http://ucrel.lancs.ac.uk/usas/
Best Ed 

> On 17 Jul 2016, at 20:47, Deborah Leem  wrote:
> 
> Hi everyone,
>  
> I am working on a digital humanities project and have a very rudimentary 
> knowledge of Python. A friend of mine recommended to me to reach out to the 
> Python UK community as I am looking for some help from Python developers on 
> my text-mining project.
>  
> Skills required:
> · Natural Language Processing
> · Text-mining experience
> · Regex
> · GIS experience desirable
>  
> Funding may be available. Full credit will be given for all assistance 
> provided.
>  
> It is a great opportunity for you to get involved in a very creative academic 
> research project with researchers. Please get in touch for more details if 
> you are interested in helping.
>  
> Kind regards,
>  
> Deborah Leem
>  
> Wellcome exists to improve health for everyone by helping great ideas to 
> thrive. We're a global charitable foundation, both politically and 
> financially independent. We support scientists and researchers, take on big 
> problems, fuel imaginations and spark debate.
> 
> The Wellcome Trust is a charity registered in England and Wales, no. 210183. 
> Its sole trustee is The Wellcome Trust Limited, a company registered in 
> England and Wales, no. 2711000 (whose registered office is at 215 Euston 
> Road, London NW1 2BE, UK) 
> 
> This message has been scanned for viruses by Websense Hosted Email Security
> 
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Re: [python-uk] URGENT: Volunteers for teacher collaboration please... :-)

[Edward Hartley]

Hi
I've not seen what the commitment is but I can do something in the risibly 
named northern powerhouse corridor between Manchester and York dependent on 
contract commitments. 47 years programming 17 Python.
Best 
Ed

> On 17 Feb 2016, at 13:29, Nicholas H.Tollervey  wrote:
> 
> Hi Helen, Conrad, Ytian and Harry!
> 
> :-P
> 
> I'll be in touch!
> 
> N.
> 
>> On 17/02/16 12:50, Helen Sherwood-Taylor wrote:
>> I could do Southampton.
>> 
>>> On 17 February 2016 at 12:07, Conrad Ho  wrote:
>>> I can do London + if Harry goes somewhere I could also tag along.
>>> 
>>> Conrad
>>> 
>>> 
 On 02/17-11:33, xtian wrote:
 
 I'm keen too! I can only really do London though, sorry.
 
 On Wed, 17 Feb 2016, 11:25 Harry Percival 
 wrote:
 
> v much up for this.  London easiest for me but I'm sure I can wrangle
> some
> time off if you need someone to trek up the country somewhere...
> 
>> On 17 February 2016 at 10:49, Zeth  wrote:
>> 
>> Hi Nick,
>> 
>> Put me down for Birmingham of course, probably can do Nottingham and
>> some of the Northern ones if needed.
>> 
>> Best Wishes,
>> Zeth
>> 
>> On 17 February 2016 at 08:30, Nicholas H.Tollervey 
>> wrote:
>>> Hi Folks,
>>> 
>>> I realise I must sound like a stuck record about this sort of thing -
>>> please accept my sincere apologies.
>>> 
>>> TL;DR: I need volunteers from around the country to support a twilight
>>> meetup of teachers happening in various parts of the UK. It's not
>>> difficult and likely to be a lot of fun and will only take a few hours
>>> of your time in the early evening of a single day. I may be able to
>>> cover travel expenses. Please get in touch. More detail below...
>>> 
>>> Computing at School (see: http://www.computingatschool.org.uk/), a
>> grass
>>> roots movement of computing teachers in the UK would like to run a
>>> series of training courses for "Master Teachers" in MicroPython on the
>>> BBC micro:bit during March. These teachers would go on to act as the
>>> seed / catalyst for other teachers who require Python training during
>>> a
>>> series of training events over the summer. Put simply, this is an
>>> exercise in Python evangelism for teachers.
>>> 
>>> Master teachers are those who have demonstrated a combination of deep
>>> subject knowledge and teaching skill. Put simply, they're the most
>>> senior teachers you can get. They're also the leaders in the field and
>>> what they say or do influences many hundreds of their colleagues.
>>> 
>>> The idea is for the master teachers to get together with Python
>>> developers (that'd be *you*) for a few hours to work through
>>> MicroPython
>>> related educational resources. These events would happen at university
>>> based hubs around the country. As a Python developer you'll *get a BBC
>>> micro:bit* and be expected to offer advice, answer questions and
>>> demonstrate Python as needed. Honestly, it's not an onerous task and
>>> will only last a few hours in a "twilight" session (i.e. after work).
>>> 
>>> The locations and proposed dates are as follows:
>>> 
>>> London: 25th February
>>> Birmingham: 9th March
>>> Nottingham: 15th March
>>> Lancaster: 16th March
>>> Newcastle: 17th March
>>> Hertfordshire: 21st March
>>> Manchester: 23rd March
>>> Southampton: 23rd March
>>> 
>>> It's easy for UK Python to be very London-centric. This is an
>>> opportunity for Pythonistas throughout the UK to step up and get
>> involved.
>>> 
>>> Why should you volunteer a few hours of your time to help teachers?
>>> Need
>>> you ask? Your help and influence will ultimately contribute to the
>>> education of the next generation of programmers - your future
>>> colleagues. It's a way to give back to the community by fostering the
>>> next generation of Pythonistas with the help of the CAS Master
>>> Teachers.
>>> It's also, from a moral point of view, simply a selfless and
>>> unambiguously good thing to do.
>>> 
>>> If you're thinking "oh, they won't want me", then YOU ARE EXACTLY THE
>>> PERSON WE NEED! Your experience, perspective and knowledge is
>>> invaluable
>>> and teachers need to hear from you. Rest assured, this will not be a
>>> difficult or high-pressure activity. In fact, it's likely to be a lot
>>> of
>>> fun.
>>> 
>>> Remember that awesome person who mentored you and/or gave you a step
>>> up?
>>> Now's your chance to be that person for a group of master teachers.
>>> 
>>> If this is of interest to you, please get in touch ASAP and I can
>>> start
>>> to coordinate things with CAS.
>>> 

Re: [python-uk] Suggestions / best practices for deployment

[Edward Hartley]

+1 from another dinosaur
Ed

On 16 May 2013, at 16:46, Andy Robinson a...@reportlab.com wrote:

 Speaking as a relatively obsolete dinosaur, I would suggest that if
 you are going to discuss specific deployment practices, you start with
 the most fundamental ones:  SSH, the unix shell and so on.
 
 We have had issues over the years with people coming in and
 introducing sexy new deployment tools, but ultimately they all just
 run unix commands.  Anyone managing a web application in the
 non-microsoft world is ultimately depending on this.  Some key skills
 (assuming a Linux/Mac/Unix-ish environment):
 - know about SSH keys and logging into remote machines
 - know the basics of at least one command line editor (e.g. vi)
 - basic shell knowledge:  environment variables, testing for existence
 of files and directories etc
 - how to interact with your database from the command line, if you use
 one (including dump and restore)
 - how your web server works: starting, stopping, configuration files,
 where log files live and how it talks to Python
 
 Fabric may be useful if you want to control half a dozen machines from
 your desktop, and it might add a lot of value if you want to control a
 hundred of them.  But to update one server, you deploy by logging into
 it and then running commands or short scripts.
 
 For example, we have a 'demo site' we rebuild pretty often that uses
 Django, MYSQL, Celery and a few other things.  It runs on plain
 vanilla Ubuntu machines we build ourselves.  The sequence is...
 
 1. Log in via SSH
 2. CD to correct directory
 3. activate virtual environment
 4. stop any celery worker processes
 5. stop web server processes (* in our setup, we leave Apache running)
 6. pull latest code from mercurial - both the app, and 3-4 libraries
 it depends on
 7. run a management command to rebuild the database
 8. run a smallish in-place test suite
 9. restart celery workers
 10.restart web server
 11. log out
 
 All of this after the login and CD can be handled by a shell script on
 the path of the server, so you can just run a command called something
 like
  ./update_server
 
 More realistically, we tend to end up with a management shell script
 called 'server' with a bunch of commands/arguments like 'stop / start
 / restart / update-code-in-staging / copy-live-data-to-staging /
 run-health-checks / swap-live-and-staging' and so on.  SSH can execute
 remote commands like this just fine with the right arguments, if
 actually logging in is too tedious.
 
 Production sites are complex and all different.  You might want to do
 instantaneous swaps from live to staging (and be able to back out fast
 if stuff goes wrong); to switch DNS so the world is looking at another
 server while you update one; you might have large databases to copy or
 migrate that need significant time; it may or may not be acceptable to
 lose sessions and have downtime; and so on.
 
 
 It takes less time to learn the fundamentals than you will spend
 debugging why your fancy new deployment tool stopped working after
 some Python dependency upgrade somewhere.   And it is less likely that
 your new hires will disagree if you stick with the lowest common
 denominator.
 
 If you already know the fundamentals and make an informed decision to
 use a popular deployment tool, that's fine.  Just take the time to
 write down why you use it in your docs so people will know if its no
 longer appropriate one day.
 
 ---
 
 So, my 2p worth is that in the book you might want to show a
 Linux/Apache setup, discuss what kind of scripts ought to exist on the
 box for managing it, discuss concerns you MIGHT need to address during
 deployment, and tell people to automate it.   Then point out that
 there are many popular higher-level tools.
 
 - Andy
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Re: [python-uk] Python in Edinburgh

[Edward Hartley]

On 11 Aug 2010, at 17:46, Anand Kumria akum...@acm.org wrote:

 Hey all,
 
 Just a head's up that there are a bunch of us Pythonista's meeting up in 
 Edinburgh on the 24th Aug (yes, during the festival!)
 
Hi
 good to here about this, I'll try to get along as I'm in the area for a week 
or two longer.
Cheers
Ed
 We'll be at Bert's bar - http://www.bertsbar.co.uk/
 
 If you are going to be in the area, pop along.
 
 Cheers,
 Anand
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Re: [python-uk] Python UK user groups / website / coordination

[Edward Hartley]

On 2 Aug 2010, at 09:16, Nicholas Tollervey nt...@ntoll.org wrote:

 Folks,
 
 During Europython a group of us who organise various Python related user 
 groups within the UK went for a drink. Here's what we talked about:
 snip
Hi,
I'm all for this the main reason I turned from Python to iOS was the apparent 
impossibility of sustained  UK contract or other freelance employment in the 
UK. Mind you iOS is equally interesting 
Best of Luck
Ed

 
 Nicholas.
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Re: [python-uk] emacs and python and emacs-starter-kit

[Edward Hartley]

On 17 Mar 2010, at 14:44, Michael Sparks m...@cerenity.org wrote:


On Wednesday 17 March 2010 14:30:01 Andy Kilner wrote:

You'll both be at the pyssup tonight so you can go and form a little
emacs corner somewhere  the cellar maybe?


Surely you're not suggesting putting all the emacs users in a deep  
dark hole

in the ground, are you ?


If he does I may have to join them as I find myself in town today.
:)

;-)

Michael.
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Re: [python-uk] 2nd London Python Dojo - 18:30 15 October 2009 at Fry-IT

[Edward Hartley]

Sent from my iPhone at last the handheld that works!

On 7 Oct 2009, at 12:41, Dave Kirby dave.x.ki...@gmail.com wrote:


As Tim says, ipython is a superset of the regular python shell, so you
can ignore all the features and get along with it just fine.

The features I find most useful (and which I think will be of benefit
to the dojo) are context-sensitive tab completion and the help system.
Using these is an order of magnitude faster than looking things up in
the docs and works for any modules or objects that ipython can see.

Another use is when exploring an API or doing what if's on parameter  
values is to use log files. Then incrementally edit and reload as a  
method. Then extend the method,  rinse and repeat. Finally wrap the  
results up into a class and add a main that exercises tests cases on  
the class.

Ed

It also has a bunch of built-in commands such as 'cd', 'ls', 'rm',
'cp' etc for accessing the filesystem, 'time' and 'timeit' for timing
fragments of code, 'run' to execute a file in the namespace of the
interactive session, 'ed' to edit text in a text editor and execute
the code as if it was typed at the prompt, and many more.

Dave
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Re: [python-uk] London Python meetup, Wednesday, October the 10th

[Edward Hartley]

Sorry I'm traveling that day, good luck with it though.
Ed Hartley

On 9/18/07, Sam Clegg [EMAIL PROTECTED] wrote:

 On Tue, 2007-09-18 at 15:15 +0100, Fuzzyman wrote:
  I could give a quick demo of IronPython and Silverlight - anything from
  10mins upwards...

 Mmm... I love to see that.  That isn't with moonlight on mono by any
 chance?


 
  Michael
 
  Tim Golden wrote:
 
  ThoughtWorks UK (my employer) have given us the use of a room this
  time, so I'm looking for volunteer speakers, too.
  
  
  
  I'm in. Happy to give a talk, too. (WMI, active directory, win32 sort
 of
  stuff).
  
  TJG
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