Sebastian Witowski – Medium

Sebastian Witowski

How to Make a Great Conference Talk

Are you an aspiring conference speaker looking to improve your presentation skills? Check out my conference speaking guide.

Mar 20, 2023

How to Make a Great Conference Talk

Mar 20, 2023

Upgrade Your Python Version

Here is an idea for a completely free¹ speed improvement for your code — upgrade your Python version!

Mar 2, 2023

Upgrade Your Python Version

Mar 2, 2023

String Formatting

With four different ways of formatting strings in Python 3.6 and above, it’s time to look at which one is the fastest.

Mar 2, 2023

String Formatting

Mar 2, 2023

Compare to None

What’s the best way to compare something to None in Python?

Feb 23, 2023

Compare to None

Feb 23, 2023

Membership Testing

Why iterating over the whole list is a bad idea, what data structure is best for membership testing, and when it makes sense to use it?

Feb 9, 2023

Membership Testing

Feb 9, 2023

Checking for True or False

How can we compare a variable to True or False, what’s the difference between “is” and “==” operators, and what are truthy values?

Feb 2, 2023

Checking for True or False

Feb 2, 2023

Add Comments To Your Commands

A quick tip: when you write an important command in shell, put a comment next to it so you can easily find it later or remember what it…

Jan 26, 2023

Add Comments To Your Commands

Jan 26, 2023

WTF Excel?!

For a tool that probably underlies most of the financial systems in the world, Excel has some incredibly weird limitations and quirks.

Jan 26, 2023

WTF Excel?!

Jan 26, 2023

Python Versions Management With pyenv

Using the latest version of Python is always a good idea. First of all - you get the new features like the f-strings (Python 3.6), ordered…

Jan 20, 2023

Python Versions Management With pyenv

Jan 20, 2023

Dictionary Comprehension

Is using dictionary comprehension faster than calling the dict() function? And what’s the most efficient way to create a dictionary from…

Jan 19, 2023

Dictionary Comprehension

Jan 19, 2023

Sebastian Witowski

Sebastian Witowski

Python consultant and freelancer at switowski.com. Writes about productivity, tools, Python, and programming best practices.

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