Streamlit Explained: Python Tutorial for Data Scientists | Issue #2


Hi there,

I recently published a video on YouTube about improving data dashboards. That’s great if you already have one, but what if you don't know where to start? 🤔💡

No worries! In this week's video, I'll cover how to set up your own dashboard using Streamlit, a user-friendly tool for creating web apps for any data project! 📊💻

Enjoy the video and happy coding! 😉

Cheers,

Arjan

video preview

# News

Git Hooks: We’re Not Using Them Enough!

Git Hooks allows you to run scripts when specific actions occur, such as merging and committing. 🧬

Initially, this may sound appealing. However, if you misuse them, they can actually lead to more problems than solutions. ❌

That’s why, in this week’s Tuesday Tips, I introduced Git Hooks, how to use them, and which pitfalls to avoid! 🕳️

You can watch the video here.

video preview

Python Itertools Tutorial: Efficient Data Techniques

Have you ever struggled with complex loops or managing multiple data streams in Python? 🐍

You’re not alone! These tasks can be challenging. 🫂

In this week’s blog, I share my favorite modules for handling iteration. The power of iterators is truly unlocked when combined.

Click here to read the blog and discover some of the awesome and useful combinations I’ve used in my projects.

# Community

In 2023, Showertime posted in our #📈career_and_growth channel seeking advice on transitioning from data science to data engineering. As usual in our Discord community, many helpful individuals shared their opinions, feedback, and recommendations.

What's really interesting is that this post has remained consistently active! New people frequently join the discussion, sparking conversations with new topics or replying to older messages. 🔥

It's truly impressive, making it one of our longest-standing active posts. If you'd like to share your own thoughts, click here to join ArjanCodes' Discord. 💻 click ​here​ to join ArjanCodes' Discord. 💻

Our student platform is always buzzing with activity. 🔊

Here's an interesting conversation among students about how to make code operations more performant for pandas DataFrames by using alternatives to the dataframe.apply function.


Do you enjoy my content on YouTube and would you like to dive in deeper? Check out my online courses below. They've helped thousands of developers take the next step in their careers.

🚀 The Mindset Online Course Series

The goal of this series is to help junior developers grow their skills to become senior developers faster.

💥 Other Courses

💡 If you’re part of a development team at a company, I offer special packages for companies that give your team the tools to consistently write high-quality code and dramatically increase your team's productivity.

🪄 Learntail

My team and I created an AI quiz generator designed to accelerate your learning, called Learntail. You can try it for free or unlock even more capabilities and features with the monthly subscription. Take a look here.

Unsubscribe | Send by ArjanCodes

Wolvenplein 25, Utrecht, UT 3512 CK

The Friday Loop

Every Friday, you'll get a recap of the most important and exciting Python and coding news. The Friday Loop also keeps everyone posted on new ArjanCodes courses and any limited offers coming up.

Read more from The Friday Loop

Hi there, You’ve probably heard of the SOLID principles... and maybe even felt guilty for not applying them more. But how useful are they really when you’re writing Python? In my latest video, I take a simple but realistic example and implement it three ways: A messy, all-in-one class that gets the job done A cleaner, class-based version that follows SOLID principles A lightweight, functional approach that may be more Pythonic In the end, the important thing is to understand where design...

Hi there, You’ve probably heard it before: "Singletons are an anti-pattern!" And… yes. They often are. Especially when they’re used to add global state to your app and create coupling and bugs. But... there’s a different side of the Singleton pattern. In this week’s video, I cover why Singletons get a bad reputation. I'll also show you a practical use case where Singleton might actually be helpful. Enjoy the video, and hope you have a great weekend. Cheers, Arjan Do you enjoy my content on...

Hi there, You’ve probably noticed this by now: LLM prototypes are easy to build. But as soon as you try to turn them into actual production LLM systems… a lot more goes into it. In this week’s video, I walk through how to structure AI agents in Python using design patterns like Chain of Responsibility, Observer, and Strategy. I’ll build a fully functional travel assistant using Pydantic AI and explore how to make your agent pipelines more maintainable, testable, and modular. Hope you enjoy...