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

How I Organize My Notes With Obsidian

After years of using Evernote, I finally found a worthy replacement. And not only for Evernote but for two other tools as well. Let me show

Dec 23, 2022

How I Organize My Notes With Obsidian

Dec 23, 2022

dict() vs. {}

Is using {} faster than dict()? If yes, then why? And when would you use one version over the other?

Dec 1, 2022

dict() vs. {}

Dec 1, 2022

How to Benchmark (Python) Code

There are plenty of ways to measure the speed of your code. Let me show you a few that I considered for the Writing Faster Python series.

Nov 17, 2022

How to Benchmark (Python) Code

Nov 17, 2022

Published in
Python in Plain English

25 IPython Tips for Your Next Advent of Code

I’ve decided to skip last year’s Advent of Code edition. Mostly because I didn’t have time, but I also knew that I probably wouldn’t…

Jan 29, 2021

25 IPython Tips for Your Next Advent of Code

Jan 29, 2021

Published in
Python in Plain English

Sorting Lists in Python

What’s the fastest way to sort a list? When can you use sort() and when you need to use sorted() instead?

Oct 22, 2020

Sorting Lists in Python

Oct 22, 2020

Remove Duplicates From a List

What’s the fastest way to remove duplicates from a list?

Oct 22, 2020

Remove Duplicates From a List

Oct 22, 2020

Published in
Python in Plain English

Python: For Loop vs. List Comprehension

Simple “for loops” can be replaced with a list comprehension. But is it going to make our code faster?

Oct 15, 2020

Python: For Loop vs. List Comprehension

Oct 15, 2020

type() vs. isinstance()

What’s the difference between type() and isinstance() methods, and which one is better for checking the type of an object?

Oct 15, 2020

type() vs. isinstance()

Oct 15, 2020

Published in
Python in Plain English

Should We Still Use OrderedDict in Python?

Dictionaries in the latest Python versions preserve the insertion order. So, is there any reason to still use the OrderedDict?

Oct 8, 2020

Should We Still Use OrderedDict in Python?

Oct 8, 2020

Published in
Python in Plain English

Easy Speedup Wins With Numba

Numba library has plenty of tools to speed up your mathematical-heavy programs. From a simple @jit decorator, all the way to using CUDA…

Oct 1, 2020

Easy Speedup Wins With Numba

Oct 1, 2020

Sebastian Witowski

Sebastian Witowski

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

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