Mailman 3 February 2022 - python-uk

London Dojo next Thursday
by Tom Viner March 15, 2024

March 15, 2024

Hi all, For February's London code dojo, we'll be at Sohonet <https://www.sohonet.com/>. We'll have pizza, drinks and some fun group coding. All abilities welcome! There'll also be the prize draw for a random O'Reilly Python book as usual. *6:30pm Thursday 1st Feb 2018* Get your tickets while they're hot: https://www.eventbrite.co.uk/e/london-python-code-dojo-season-9-episode-6-t… If you need any more information, contact the team via Twitter: @ldnpydojo <https://twitter.com/ldnpydojo> or via e-mails to team(a)ldnpydojo.org.uk We're always looking for venues to host the Dojo and volunteers to be cat herders, i.e. writing an email like this and coordinating the voting etc. Look forward to seeing you next Thursday! Tom @tomviner <https://twitter.com/tomviner>

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C is it faster than numpy
by BELAHCENE Abdelkader Feb. 27, 2022

Feb. 27, 2022

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 50000* sum with Python: 1250025000 and NumPy 1250025000 time used Python Sum: * 37.28 sec * time used Numpy Sum: *1.85 sec* Labs$ *./tt 50000 * * 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 <time.h> #include <stdio.h> #include <stdlib.h> 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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TeX Hour tonight: Better Technical Documentation: 18:30 UTC time
by Jonathan Fine Feb. 24, 2022

Feb. 24, 2022

Hi Tonight's TeX hour is from 6:30 to 7:30pm UK (and UTC) time. The UK time now: https://time.is/UK. The zoom URL is https://us02web.zoom.us/j/78551255396?pwd=cHdJN0pTTXRlRCtSd1lCTHpuWmNIUT09 Last week I attended a "needs discovery" meeting organised by Daniele Procida, who I've met several times at UK Python conferences. Daniele is now one of several Directors of Engineering at Canonical, the developers of Ubuntu Linux, where he has special responsibility for improving both documentation and the process by which it is created. Daniele is also a current Fellow of the Software Sustainability Institute. The meeting last week was to discover needs for a workshop he's holding next month, to help Research Software Engineers improve their documentation. There were over 20 people there. I hope that at tonight's TeX Hour we will share our experience of writing, rendering and using technical documentation, particularly for software. Daniele's approach is focussed on a quadrant of user needs. The quadrant is Top left: Tutorials (focussed on learning). Top right: How-to guides (focussed on tasks). Bottom left: Explanation (focussed on understanding). Bottom right: Reference (focussed on information). The up-down axis is practice and theory. The left-right axis is study and work. Interested? Reflect on your own documentation experience, and visit: https://www.software.ac.uk/about/fellows/daniele-procida https://diataxis.fr/ https://mail.python.org/pipermail/python-uk/2022-February/004828.html Tonight's TeX hour is from 6:30 to 7:30pm UK (and UTC) time. The UK time now: https://time.is/UK. The zoom URL is https://us02web.zoom.us/j/78551255396?pwd=cHdJN0pTTXRlRCtSd1lCTHpuWmNIUT09 wishing you beautiful and effective documents Jonathan

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JOB | Software Development Manager (Edinburgh, UK)
by James Tobin Feb. 20, 2022

Feb. 20, 2022

Hello, I'm working with a software house (they build applications for their financial clients) - that wants to establish an office in Edinburgh and are therefore looking to hire a development manager - someone to open and manage the office as well as code (Core Java, Javascript, Python, React etc). Consequently, I had hoped that some members of this list may like to discuss with me further. I can be reached using "jamesbtobin (at) gmail (dot) com". Kind regards, James

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Jobs: Python Full Stack Developer & Cloud Engineer with Anglo American
by Robin Wilson Feb. 17, 2022

Feb. 17, 2022

We are a new team at Anglo American (a large mining and minerals company), working on image data at scale. There are several problems with how things are currently, including: storage limited to local hard drives, compute limited to desktops, data silos and difficulties in finding and sharing image data. The solution that you will help build will use cloud and web technologies to store, search, visualize and run compute on global scale image archives (Terabyte to Petabyte). Both jobs will be using Python extensively, and familiarity with the PyData stack (particularly XArray and Dask) and Python web development tools (eg. FastAPI) will be extremely useful. Experience with spatial data is also a massive plus. Both jobs are remote, within UTC +/- 2 - although UK-based is ideal. Both will be contractors, at a competitive day rate. Full stack developer: Your focus will be full stack web development, building back-end APIs and front-end interfaces for users to easily access these large image archives. We will be building on open tools and standards written in Python (such as the Spatio-Temporal Asset Catalog, Titiler and Dask), and you will be extending and modifying these, as well as writing new serverless APIs in Python. Front-end development will be within the context of Anglo American frameworks, primarily using React, and will involve map visualization tools such as Leaflet and/or OpenLayers. Full details: https://drive.google.com/file/d/1nBnwC9JoVHmbNbYKtlpG8doRmA3Sg1JR/view Cloud Engineer: Your focus will be on using cloud technology to scale up capabilities (e.g. storage, search and compute). You will be building and orchestrating cloud services including serverless APIs, large databases, storage accounts, Kubernetes clusters and more, all using an Infrastructure as Code approach. We work on the Microsoft Azure cloud platform, and are building on top of open-source tools and open-standards such as the Spatio-Temporal Asset Catalog, webmap tiling services such as Titiler, and the Dask parallel processing framework. Full details: https://drive.google.com/file/d/1IXvmjrPQBfXG5RqeUQUhJh6JQm31YH8r/view Thanks, Robin

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Documentation workshops for researchers and research software engineers
by Daniele Procida Feb. 12, 2022

Feb. 12, 2022

Greetings Pythonistas. As part of my fellowship of the Software Sustainability Institute, I am running a series of software documentation workshops. The aim is to help improve research software and the reproducibility of research by introducing better, easier ways to document software, and also for me to learn how the work I’ve been doing in documentation in recent years can better serve the needs of researchers. All the details: https://docs.google.com/document/d/e/2PACX-1vQEZf-uZkDc1dOAWEUMWN1TaWBIQdED… But don’t hesitate to get in touch with any questions. Daniele

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PermissionError: [Errno 13] Permission denied: 'Abc.xlsx'
by Arshad Noman Feb. 9, 2022

Feb. 9, 2022

When I enter data using Tkinter form in an Excel file when the excel file is closed there is no error but when I enter data using Tkinter form when the excel is already open following error comes: Exception in Tkinter callback Traceback (most recent call last): File "C:\Users\Dani Brothers\Anaconda3\lib\tkinter\__init__.py", line 1705, in __call__ return self.func(*args) File "D:/Python/Book Bank/New folder/PyCharm/Final/Excel.py", line 61, in SaveBook workbook.save(filename="BookBank.xlsx") File "C:\Users\Dani Brothers\Anaconda3\lib\site-packages\openpyxl\workbook\workbook.py", line 392, in save save_workbook(self, filename) File "C:\Users\Dani Brothers\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 291, in save_workbook archive = ZipFile(filename, 'w', ZIP_DEFLATED, allowZip64=True) File "C:\Users\Dani Brothers\Anaconda3\lib\zipfile.py", line 1207, in __init__ self.fp = io.open(file, filemode) PermissionError: [Errno 13] Permission denied: 'Abc.xlsx' What to do to correct this error? I have already searched on google search many times but no solution was found.

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We are looking for highly-skilled Python back-end developers / data engineers.
by Ema Nicklas Feb. 8, 2022

Feb. 8, 2022

The job Looking to join a friendly, developer-led company? We're Tech City Labs, a growing data engineering and consulting company. We're looking for talented data engineers to join our brilliant team of engaging, experienced developers. Python is our language of choice, and most of our work is doing data engineering in Python. You'll be working on client engagements and our own startup-style internal projects, so expect variety and the chance to work on a range of data-heavy projects. We have several roles to fill, so we’d love to hear from you whatever your level of experience. Who Should Apply? - You’ll need 4+ years of experience working with Python and an interest in data engineering - Communication skills are vital: you'll need to be comfortable - and enjoy - working with clients and understanding complex requirements - As a remote-first business, excellent writing skills are essential: we're in Slack all-day - We’re strong believers in TDD (with Pytest) and you should be too - Experience working with AWS is a bonus, and being comfortable on the command line is a must - Must enjoy the challenge of getting stuck into architecture - You’ll enjoy working independently but can contribute to the small, agile teams in which we operate as needed - You’ll be fluent in English, and preferably based in the UK or have experience working in the UK What will your day-to-day look like? Varied! If you're working on a client project, you'll be part of a small team, responding to client requests and implementing them. If you're running a new project for our data business, you'll be building data systems from scratch, working closely with our Founder and assisting with API and data pipeline development where required. Some examples of recent projects include: - Building data transformations using dbt (http://getdbt.com) - Creating an API using the Serverless framework ( https://www.serverless.com/) and deploying to AWS - Setting up the infrastructure to track changes in a database and deliver via web sockets in real-time - Writing data pipelines parse GIS data into PostGIS ( https://postgis.net/) Technologies we use We understand that good developers can pick up any well-designed technology quickly, so we don’t require specific experience other than Python. If you join us, you can expect to be working with some of the following: - Postgres - MySQL - Airflow - dbt - A whole range of AWS services - Serverless - Flask - FastAPI Who are Tech City Labs? - We’re a developer-led, data engineering and consulting company - We’re a friendly, collaborative and supportive team with a culture of development excellence - We value the differences our people bring - We are committed to remote working - we do get together at least quarterly so you should be prepared to travel occasionally to Reading or other exotic destinations (all expenses covered) - We're flexible, but you must be able to (mostly) keep UK working hours and attend morning standups - We practice and preach sound development practices. We hope you'll learn and grow as a developer working with us (and we'll learn from you, too) - We have a no-drama office policy. We value and cultivate enjoyable working relationships among team members. - If you apply, we guarantee that we will give you a response, yes or no; absolutely no ghosting! What We Offer: - Flexible benefits - one size does not fit all. Prefer a beer membership to a gym card? That’s fine with us - Need somewhere to work that gets you out of your house? We’ll cover a co-working membership at a space convenient for you - Our quarterly meetups are all-expenses-paid and are enjoyable - really - Salary accordingly to experience, plus an annual bonus - 25 days holiday - A no-nonesense environment: we appreciate our team and do our best to show it. - Salary range: £40-£60k per annum. Application Process 1. We carefully review every CV we receive 2. For those that we shortlist, we'll ask you to do a short (less than five minutes) VideoAsk interview that is about personality and what makes you tick, not what’s on your CV 3. If we think your style will work with our team, and you could be happy with us, we'll then have a 30min 'get to know each other’ chat 4. Finally we may ask you to do a short coding test (1-2hr) in your own time, which will be followed by an in-depth technical interview (45min) to discuss the way you approached the coding task (if you did one), your experience and your hard skills 5. If everyone is happy, we’ll discuss package details and getting you onboard. If not, we’ll be honest about why we didn’t proceed to hire. We respond to every application.

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Research Assistant/Associate in PL/VMs, King's College London
by Edd Barrett Feb. 7, 2022

Feb. 7, 2022

Hi everyone, The soft-dev team at King's has an open position for a Research Assistant or Associate: apply on or before Feb 24th. This position requires a mix of research and engineering to understand how to migrate programs between different versions of a language, using Python 2 to Python 3 as a concrete example. We will need to tackle the problem from different angles, for example augmenting CPython 2.x to dynamically identify idioms which will cause problems under Python 3. Excellent programming skills (C and Python are particularly useful, but excellence can be shown in any other programming language too e.g. C++/Java/Rust) are required for this role as is the ability to work well with others. The successful applicant will work in a friendly team with existing Python and VM skills. We welcome people with different backgrounds/routes into research: there's no need to fit a standard profile (e.g. the successful applicant need not have a PhD). We are also comfortable, and experienced, with long-term largely-remote work within the UK. More details can be found here: https://jobs.kcl.ac.uk/gb/en/job/036186/Research-Associate Please contact Laurence Tratt <laurie(a)tratt.net> with any informal queries you may have. Thanks! -- Best Regards Edd Barrett https://www.theunixzoo.co.uk

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