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340 posts latest post 2026-03-27
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Feb 2026 | 6 posts

Pytest capsys

Testing print/log statements in pytest can be a bit tricky, capsys makes it super easy, but I often struggle to find it.

capsys is a builtin pytest fixture that can be passed into any test to capture stdin/stdout. For a more comprehensive description check out the docs on capsys

Simply create a test function that accepts capsys as an argument and pytest will give you a capsys opject.

1 min read

Building Rich a Dev Server

Draft Post

I’ve really been digging @willmcgugan’s rich library for creating TUI like interfaces in python. I’ve only recently started to take full advantage of it.

I am working on a project in which I want to have a dev server running continuously in the background. I really like dev servers...

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Site Down During Build

Recently I noticed a new netlify site of mine was down while I was checking to see if new content was live. Later found out this was consistent after each and every push the site would go gown as soon as I hit push, and would not come back until the build finished.

Do other Netlify sites go down during build???

Short Answer NO. All of my google fu lead me to believe I was alone and none of my other sites do this.

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Kedro pipeline_registry.py

With the realease of kedro==0.17.2 came a new module in the project template pipeline_registry.py. Here are some notes that I learned while playing with this new module.

You should now have something that looks like this in your src/<package-name>/pipeline_registry.py.

"""Project pipelines.""" from typing import Dict from kedro.pipeline import Pipeline def register_pipelines() -> Dict[str, Pipeline]: """Register the project's pipelines. Returns: A mapping from a pipeline name to a ``Pipeline`` object. """ return {"__default__": Pipeline([])}

pipeline_registry only works in kedro>=0.17.2

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Stand With Your Team

People who are quick to toss team members under a bus are not well trusted or highly thought of and it will lead to some toxic team dynamics.

While collaborating on any project there are going to be decisions made that aren’t necessarily your favorite, during a summer internship my mentor made some decisions that I was not on board with, but I accepted his wisdom and moved forward with little push back.

During a review, leadership showed interest in the option that I wanted to go towards. I was quick to jump up and say I told you so right then and there and pitch reasons why my idea was so much better.

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Blogging For Me

I create this blog with one person in mind, me.

This is not completely selfish, as there are likely many others out there that think similarly to me. Everyone comes from different backgrounds and varying levels of experience. In no way do you need to be an expert to create content others will benefit from.

I am as accurate as possible. I don’t know everything, and If I waited for that to happen I would never post, or write at such a high level no one else (including me) would ever want to read.

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3 min read

Minimal Kedro Pipeline

How small can a minimum kedro pipeline ready to package be? I made one within 4 files that you can pip install. It’s only a total of 35 lines of python, 8 in setup.py and 27 in mini_kedro_pipeline.py.

📝 Note this is only a composable pipeline, not a full project, it does not contain a catalog or runner.

I have everything for this post hosted in this gihub repo, you can fork it, clone it, or just follow along.

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Markdown Cli

This is a post that may be a work in progress for awhile, Its a collections of thoughts on managing my blog, but could be translated into anythiung that is just a collection of markdown.

My Content Strategy For 2021

I am making another push in 2021 to get my content out in the world and meeting users where they are. See how I plan to execute.

My content is written in markdown, all markdown. I find that markdown does a really great job at getting out of the way and letting ideas flow onto the page. I am never fussing with fonts and formatting while physically writing posts. Not that I don’t spend way more time than I need to tweak these things on my own personal site where everything gets posted.

Much of what I create is inside of short articles that get posted to my personal site waylonwalker.com. These will get cross-posted to DEV, 3 min read 💬 1

Quickly Edit Posts

Recently I automated starting new posts with a python script. Today I want to work on the next part that is editing those posts quickly.

Automating my Post Starter

Check out this post about setting up my posts with python 🐍

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Gitui is a blazing fast terminal git interface

Gitui is a terminal-based git user interface (TUI) that will change the way that you work with git. I have been a long-time user of the git cli, and it’s been hard to beat, mostly because there is nothing that keeps my fingers on the keyboard quite like it, except gitui which comes with some great ways to very quickly walk through a git project.

Go to their [releases]https://github.com/extrawurst/gitui/releases) page, download the latest build, and pop it on your PATH. I have the following stuffed away in some install scripts to get the latest version.

install latest release

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2 min read

Kedro - My Data Is Not A Table

In python data science/engineering most of our data is in the form of some sort of table, typically a DataFrame from a library like pandas, spark, or dask.

These containers for data contain many convenient methods to manipulate table like data structures. Sometimes we leverage other data types, namely vanilla types like lists and dicts, or even numpy data types.

What is Kedro

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Quickly Change Conda Env With Fzf

Changing conda environments is a bit verbose, I use a function with fzf that both lists environments and selects the one I want in one go.

I have used conda as a virtual environment tool for years now. I started using conda for its simplicity to install packages on windows, but now that has gotten so much better and it’s been years since I have run a conda install command. I’m sure that I could use a different environment manager, but it works for me and makes sense.

What environment manager do you use for python?

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3 min read

Vim Replace Visual Star

Replacing text based on whats in the current search register is a quite handy tool that I use often. I believe I picked this tip up from Nick Janetakis, check out his YouTube channel for some amazing vim tips.

https://www.youtube.com/watch?v=fP_ckZ30gbs

If there is one thing that I Like most about vim it’s the ability to hack on it and make it work well for you.

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2 min read 💬 3

Minimal Python Package

What does it take to create an installable python package that can be hosted on pypi?

This post is somewhat inspired by the bottle framework, which is famously created as a single python module. Yes, a whole web framework is written in one file.

. ├── setup.py └── my_pipeline.py

setup.py #

from setuptools import setup setup( name="", version="0.1.0", py_modules=["my_pipeline", ], install_requires=["kedro"], ) 

name #

The name of the package can contain any letters, numbers, “_”, or “-”. Even if it’s for internal/personal consumption only I usually check for discrepancy with pypi so that you don’t run into conflicts.

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2 min read

If Tmux

I do much of my work from tmux, I love it so much that I want to setup some functionality that puts me in tmux even if I didn’t ask for it.

Bash function to check if the shell is in a tmux session.

in_tmux () { if [ -n "$TMUX" ]; then return 0 else return 1 fi }

Using the bash function #

I often open up vim to do some quite edits, but before I know it I have several splits open and I need access to another shell utility, but I forgot to start in tmux. This function makes sure tht I start in tmux everytime.

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Save Vim Macro

If you are like me, you have created a macro or two that is pure glory, and you forget how you made it after a day or so, or you immediately want to store it away as a custom keybinding. As with most things with vim, it’s easy to do once you understand it.

One of the earliest things we all learn to do in vim is to create macros, custom sets of functionality stored in a register that can be replayed later.

To create a macro, get into normal mode, then type q followed by a letter that you want to store the macro under.

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3 min read 💬 3
Live Substitution In Neovim

Live Substitution In Neovim

Replacing text in vim can be quite frustrating especially since it doesn’t have live feedback to what is changing. Today I was watching Josh Branchaud’s Vim-Unalphabet series on Youtuve and realized that his vim was doing this and I had to have it.

https://twitter.com/_WaylonWalker/status/1346081617199198210

I had to do a bit of searching and found a great post from vimcasts that shows exactly how to get the live search and replace highlighting using inccomand

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Newsboat

Web browsers are a black hole of productivity. I try to use them as little as possible when it is time to focus. I try to use help, ?, or ?? with ipython, or –help at the command line as much as possible. What about that time I am trying to see what my online friends are posting on their sites? I used to used google reader quite heavily before that was taken down.

I am going to give a terminal rss reader a try for a bit and see how that goes for me. I have really struggled to get into an rss reader since google reader died.

I installed with the reccomended snap for Ubuntu.

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Large Refactor At The Command Line

As projects grow patterns that worked early on break and we need to change things to make the project easier to work with, and more welcoming to new developers.

Before you start mucking up a project with wild commands at the terminal check that you have a super clean git status. We may make some mistakes and need a way to undo 100’s files and git makes it really easy if you start with a clean history.

git status

If we are ready to begin work we should see a response like this.

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4 min read