Karma Computing

Karma Computing

Sign in Subscribe

What is a 'cost function' in Machine Learning / ML

What is a 'cost function' in Machine Learning / ML

I don't really know, deeply what a cost functino is in Machine Learning. Let's learn it. All quotes are from the excellent "Hands-On Machine Learning with Scikit-Learn, and TensorFlow, 1st Edition" unless otherwise stated. In "Hands-On Machine Learning with Scikit-Learn, and TensorFlow, 1st Edition", a cost function is defined as:

Engineering Principles & Values

thinking fast and slow

Engineering Principles & Values

A work in progress. (started ~2022 and sat in draft state for far to long) so I've decided to publish and intend to revisit. Empathy for learning Code is never the challenge. Well-rested comfortable people who feel emotionally safe have solved every problem I’ve put in front of them.

FastHTML getting started & comparison with Flask

FastHTML getting started & comparison with Flask

FastHTML is built on-top of the popular python libraries starlette, and uvicorn. FastHTML introduces Python types for common HTML elements integrated with HTMX which means you don't need to write html templates directly, and save a lot of time (in theory). It's like traditional HTML, meets stronger typing, meets niche

Deleting files "Cannot be removed because it is not empty" Error (Solved)

Deleting files "Cannot be removed because it is not empty" Error (Solved)

Struggling to delete a persistent file? We were facing the same problem! In our case, we encountered this issue while working with WSL (Windows Subsystem for Linux) and Python and we wanted to delete a folder. If you're here just for the solution, here's what you can do: Step 1:

Installing WireGuard VPN on Windows

Installing WireGuard VPN on Windows

Step 1: WireGuard download the Wireguard Windows installer Step 2: Run the installation file and the installation should automatically complete Step 3: Once the WireGuard client opens upon installation, you'll need to add tunnels to start using WireGuard. 💡What are tunnels? They are used to create a virtual network interface

Windows containers how to...not?

Windows containers how to...not?

Things to know about Windows Containers This started as an initial research into Windows Containers. My initial impression was not fantastic, left wanting. * "Windows requires the host OS version to match the container OS version" (src) * This is in stark constrast compared to Linux containers, where you can trivially, swap

How to Create a Table of Contents on Ghost

How to Create a Table of Contents on Ghost

You know what's scary? Ghosts. You know what's even scarier? Not having a table of contents on your blog posts on Ghost! That's why I'm going to show you how to make one in just a few easy steps. No coding required, no ghost hunting needed. Just follow me and you'll be fine.

If I want to get a website set up and some SEO done, what sort of figures would I be looking at?

If I want to get a website set up and some SEO done, what sort of figures would I be looking at?

"for reals though, if it's just a simple one page website, and to stick some keywords into google" ... "Without more information I'd question why not use Squarespace, Wix, WordPress? They are all adequate. We also sell small business web hosting with support. ... "Oh is it that easy?" ... "Depends what "it"

Terraform best practices - what I wish I'd learnt quicker

Terraform best practices - what I wish I'd learnt quicker

Terraform has a changed over the years (it's HCL syntax changed a lot from the early days breaking backward compatibility) and there's a few Terraform concepts which, for me, are worth holding front-and-centre to reduce pain when working with the tool. If you have existing cloud resources, approach terraform differently

A practical, detailed guide to Git branching strategy, issue creation and merging

A practical, detailed guide to Git branching strategy, issue creation and merging

Question: I would like to ask for an explanation about git best practices. Like git branching, naming branches etc Sidenote- why does all this matter & why should I care about issues, git and branching? Have you ever.. * Not had enough information about an issue/bug? * Struggled to find a link

Email Hosting Alternative to 123 Reg in the UK

Email Hosting Alternative to 123 Reg in the UK

We were surprised to learn about 123 Reg closing down its Email Hosting Generation 1 Mailboxs. But this might be the big break you needed to take a look at other regional services that cater to your email needs. We’ve got just the thing for you. Karma Computing Email

DevOps with physical servers using Redfish Python api

DevOps with physical servers using Redfish Python api

Using the Redfish ('standard') REST api, you can command and control iDRAC enabled servers just like you would your software. Software continues to eat the world, and is coming for your hardware. Why do we not treat our physical servers as part of our DevOps / operations processes? I think it's

How do I login ssh to an IPv6 server from an IPv4 internet connection?

How do I login ssh to an IPv6 server from an IPv4 internet connection?

Goals * Not everybody has an IPv6 address (see IPv6 adoption per country): * Given a valid account (ssh), allow a user on an IPv4 connection ssh to an IPv6 server running on an IPv6 host. Let's get tunnelling! * Critical goals: To the user, they should still be able to simply ssh

Docker show container run arguments

Docker show container run arguments

Sometimes you want to see exactly how a container was started, and what command line arguments were passed to , and subsequently how they were interpreted by the container runtime engine. Emmanuel Frécon provides an excellent example of how to do exactly that: docker inspect \ --format "$(curl -s https://gist.githubusercontent.

Using systemd-nspawn containers with publicly routable ips (IPv6 and IPv4) via bridged mode for high density testing whilst balancing tenant isolation

Using systemd-nspawn containers with publicly routable ips (IPv6 and IPv4) via bridged mode for high density testing whilst balancing tenant isolation

If you're tight for time and want to build this right away see the "Tutorial" heading for how to setup systemd-nspawn with bridge mode and public ip addressing. There's also an accompanying systemd-nspawn repo with a scripted process to deploy everything in this article automatically: GitHub - KarmaComputing/nspawn-systemd-nspawn-containersContribute to

Setup an IPv6 connection over IPv4 via Wireguard VPN (How to get IPv6 when you only have an IPv4 internet connection)

Setup an IPv6 connection over IPv4 via Wireguard VPN (How to get IPv6 when you only have an IPv4 internet connection)

If you don't have IPv6 at home, sometimes you want to be able to test IPv6 only services- you need to tunnel a IPv6 connection somehow from your IPv4 internet connection to a server which does have IPv6 enabled. You can achieve that by using a combination of: * A cheap

IPv6 Only Web Services Becoming Commonplace

IPv6 Only Web Services Becoming Commonplace

IPv6 connectivity (native) continues to shoot up: This trend started as a slow "it won't happen" almost joke within the IT community with efforts such as the 2012 "World IPv6 launch days" The economic incentive for IPv6 is here now What we're seeing now is the economic incentive stepping in

Transfering files from AWS S3 bucket to another AWS S3 bucket from another account.

Transfering files from AWS S3 bucket to another AWS S3 bucket from another account.

Scenario requirements: * Environment A: S3 bucket * Environment B: S3 bucket and EC2 : The EC2 is not necessary, aws cli can be installed locally. * AWS IAM user creation on both accounts with permissions: PowerUserAccess and AmazonS3FullAccess Create environment A S3 bucket Update S3 bucket permissions > Bucket policy { "Version": "2012-10-17", "Id": "", "Statement"

Ansible password vault uses

Ansible password vault uses

Instead of storing keys, passwords, environment and more in plain text here it comes Ansible Vault which is a great feature to use when you need to keep sensitive data encrypted such as pushing your keys to a remote repository. There are several ways to encrypt your sensitive data using

Photo by Greg Lloyd 1969, Photo of Hypertext Editing System (HES) console at Brown University, circa October 1969.

How to search backwards on tmux

How to search backwards/upwards on tmux. To enable tmux scroll back history press: Ctrl + b and then [. That's the Control key, and b , let go, and then press [ (the left square bracket). You'll then be able to scroll backward/forward. But how do you search? Hint: To go back

SaaS Development at Subscribie Lessons Observed

SaaS Development at Subscribie Lessons Observed

Log everything, except when you shouldn't Logging in python has always confused me. It takes a long time to set-up, but is extremely configurable, I ended up coding a small Git repo to deepen my understanding of Python logging: GitHub - KarmaComputing/python-logging-example: python logging example levels stdoutpython logging example

Make Playwright faster: experimenting with containers and build caching on Github actions

Make Playwright faster: experimenting with containers and build caching on Github actions

GitHub - KarmaComputing/playwright-testingContribute to KarmaComputing/playwright-testing development by creating an account on GitHub.GitHubKarmaComputing Background: We started using Playwright very early on, and had ended up with a test suite which was taking too long to run, and especially long on our pipelines (sounds familiar?). In the interest of

How can a process run with or without a tty, what's the difference?

thinking fast and slow

How can a process run with or without a tty, what's the difference?

A process can be associated with or run in the context of a TTY, which provides a text-based interface for the process. This means that the process will be able to read input from the TTY and write output to it. A process that is running without a TTY, on

Openai Whisper Automated AI Transcribing & Translation is here? (and how badly I speak French)

thinking fast and slow

Openai Whisper Automated AI Transcribing & Translation is here? (and how badly I speak French)

We've all tried to manually transcribe audio at some point- it takes ages! But what if computers could finally understand the Scottish accent? What if not only that, but what if computers could 'listen' to regional Chinese/Korean/Finnish/Urdu audio (with an equally challenging accents) and translate that into

[remote rejected] (refusing to allow an OAuth App to create or update workflow `.github/workflows/...` without `workflow` scope)

[remote rejected] (refusing to allow an OAuth App to create or update workflow `.github/workflows/...` without `workflow` scope)

Github OAuth apps now require the 'workflow' scope when performing operations such as pushing a new workflow to a repo. Github has started/added a new more fine-grained permissions for oauth. Previously only the scope repo was needed to read/write access to a repo given permission- however now github

Collect recurring payments with Subscribie - Try Now