Feral Cat - Software Development
Building, just because…
Carlos 
So your Apache Airflow DAG is failing silently. Are you running an ETL on a huge dataset? This is a symptom of an Airflow instance without sufficient memory. Dig into your instances logs and you’ll probably see an evicted worker if your running your instance’s workers on Kubernetes. You’ll see similar logs wherever you run … Read more
Setting up Kubernetes on AWS and got the unable to connect to the server: getting credentials: exec: executable aws-iam-authenticator not found error? Execute the following to solve your problem! Not going to bore you with fluff this time around. I am assuming that you have homebrew installed which might be a leap. Also I’m on … Read more
Listing the largest N files or folders recursively is handy. Let’s frame a usecase. So, you’re Ubuntu server is tanking. You’re running Jenkins or something else and your job logs have just started piling up. You’re UI doesn’t work anymore and the only thing you can do is SSH into your instance. What do you … Read more
Have you used Functional Annotations in Python 3.x? Maybe you’ve heard them mentioned? Regardless, let’s explore what they are and how they help us. Because if they don’t help us, then we probably shouldn’t care. The Problem You’re programming and don’t know what thisRandomFunction should return. Maybe it’s a bool maybe it’s a string who … Read more
When Airbnb was scaling rapidly, they faced the problem of organizing complex data pipelines. To combat this and become a data-driven organization, Airbnb launched Apache Airflow in 2015, their custom-made open-source platform to manage complex workflows. In simple words, Apache Airflow is a platform where you can create, schedule, and monitor complex workflows using simple … Read more
Let’s work on manipulating a dataframe. Let’s work on editing all elements of a DataFrame according to a condition. You have a horde of data you just imported from a CSV or an Excel doc. You’ve managed to get the data into a Pandas DataFrame using one of the built in import methods like read_csv … Read more
Happen to be trying to remove your computer’s name from your bash/terminal on Ubuntu? I thought it was an eyesore when I was writing up some docs and was taking screenshots. I did some research and thought I’d pass along what I learned. My Setup Windows 10 Ubuntu Subsystem Edit your hidden .bashrc file! So … Read more
What git branch am I in? It’s an age old question I’ll ask myself maybe once an hour. I’ll make a big change, decide that I need to save the repo before I break something, I make a commit (often times with commitizen), and then git push origin … . But where was I pushing … Read more
Trying to make an image clickable in React Native? It was one of the harder things for me to do when I started off so I thought I’d do a quick write up on spinning up touchable components. My Setup Starting a New React Native Project Click React Native under new project in Webstorm. This … Read more
So you’re trying to upload a Pandas DataFrame to DynamoDB using Python? Let’s take a step back first. Why are we using DynamoDB? What is DynamoDB? What is DyanmoDB DyanmoDB is a non-relational fully managed database product offered by Amazon’s cloud computing arm AWS. So why would you go the DynamoDB route vs MySQL, Postgres, … Read more