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Marcin Kozak

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Marcin Kozak

At the start — a little about Python writing

So this is it. My first post here on Medium. I’ve spent a lot of time thinking about what topic to start with, even more than the time it…

6 min readSep 22, 2022

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At the start — a little about Python writing

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Marcin Kozak
in
Towards Data Science

Slicing in Python: A Comprehensive Guide

Master Python slicing: from lists and tuples to NumPy arrays and Pandas dataframes, plus custom implementations

30 min read3 days ago

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Slicing in Python: A Comprehensive Guide

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Marcin Kozak
in
Towards Data Science

The Trap of Sprints: Don’t Be Like Scarlett O’Hara. Think Today!

Why data scientists should prioritize communication and flexibility in agile projects

8 min read5 days ago

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The Trap of Sprints: Don’t Be Like Scarlett O’Hara. Think Today!

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Marcin Kozak
in
Towards Data Science

Embedding Markdown Files in a Streamlit Dashboard

Simplify Streamlit app code by moving longer static contents to Markdown files.

6 min readMay 28, 2024

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Embedding Markdown Files in a Streamlit Dashboard

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Marcin Kozak
in
Towards Data Science

Passing Functions to Test Files in Python Pytest

This is a very frequent question, but the solution is very simple: use a fixture.

7 min readMay 27, 2024

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Passing Functions to Test Files in Python Pytest

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Marcin Kozak
in
Towards Data Science

A Guide to Powerful Python Enumerations

Improve Python code for data science with simple, readable and performant enumerations.

23 min readMay 20, 2024

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A Guide to Powerful Python Enumerations

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Marcin Kozak
in
Towards Data Science

Don’t Let the Python dir() Function Trick You!

The dir() function returns an object’s attributes. Unfortunately, it doesn’t reveal everything — discover how to find all attributes…

7 min readMay 13, 2024

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Don’t Let the Python dir() Function Trick You!

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Marcin Kozak
in
Towards Data Science

Python Type Hinting: Introduction to The Callable Syntax

The collections.abc.Callable syntax may seem difficult. Learn how to use it in practical Python coding.

14 min readMay 8, 2024

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Python Type Hinting: Introduction to The Callable Syntax

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Marcin Kozak
in
Towards Data Science

Python and the underscore (_)

The article discusses various roles the underscore plays in Python.

10 min readApr 30, 2024

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Python and the underscore (_)

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Marcin Kozak
in
Level Up Coding

Find a Bug in Python Code: Spoiled Decorators

Decorators offer a great way to change a function’s behavior. Check yourself and try to find a bug in this decorator.

7 min readApr 28, 2024

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Find a Bug in Python Code: Spoiled Decorators

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Marcin Kozak

Marcin Kozak

A full professor, interdisciplinary researcher, data scientist, statistician, Python, R and Go developer, open-source contributor — and a devoted writer

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