I'm Reuven Lerner, and I teach Python and data science to companies around the world. I also publish a free, weekly newsletter about Python and programming (Better developers), and sell a variety of Python-related courses at my online store.

On this YouTube channel, I publish videos that will help you with Python and Pandas. Many of the ideas come from participants in my courses, who ask me great questions just about every day.

Is there something you want to know? Just contact me! My students generally give me the best ideas and directions for what to teach.

Advanced unpacking in Python for loops
6:55
Advanced unpacking in Python for loops
Sorting a mix of letters and numbers in Python
9:49
Sorting a mix of letters and numbers in Python
The new case_when method in Pandas 2.2.0
10:07
The new case_when method in Pandas 2.2.0
Method chaining in Pandas
18:17
Method chaining in Pandas
Five mistakes companies make teaching Python to their staff
8:45
Five mistakes companies make teaching Python to their staff
Comparing values in Pandas with diff and pct_change
6:46
Comparing values in Pandas with diff and pct_change
Selecting rows in Pandas using .loc and lambda
9:04
Selecting rows in Pandas using .loc and lambda
Understanding with and Python's context managers
14:00
Understanding with and Python's context managers
Improve your career with Python + data: Announcing PythonDAB cohort 4
4:19
Improve your career with Python + data: Announcing PythonDAB cohort 4
*args and **kwargs — what are they, and how are they different?
10:42
*args and **kwargs — what are they, and how are they different?
Boolean indexing in Pandas made simple
8:23
Boolean indexing in Pandas made simple
Using | in Pandas? Consider the isin method instead
6:01
Using | in Pandas? Consider the isin method instead
Flipping Data with Pandas: Stack & Unstack
8:17
Flipping Data with Pandas: Stack & Unstack
The six most important read_csv arguments in Pandas
16:50
The six most important read_csv arguments in Pandas
Data selection in Pandas with filter
8:24
Data selection in Pandas with filter
Why you'll love Jupyter Notebook 7
9:13
Why you'll love Jupyter Notebook 7
NaN vs. NA — understanding Pandas nullable types
10:16
NaN vs. NA — understanding Pandas nullable types
One Python function, three different errors
5:05
One Python function, three different errors
Bang! Unix shell magic inside of Jupyter
11:27
Bang! Unix shell magic inside of Jupyter
Magic commands in Jupyter and IPython
7:33
Magic commands in Jupyter and IPython
ChatGPT wrote Pandas code to analyze US debt. Was it any good?
35:24
ChatGPT wrote Pandas code to analyze US debt. Was it any good?
ChatGPT + Noteable (Jupyter) = Mind-blowing!
20:20
ChatGPT + Noteable (Jupyter) = Mind-blowing!
Finally! Pandas exercises that aren't boring: Bamboo Weekly
2:07
Finally! Pandas exercises that aren't boring: Bamboo Weekly
Stop using inplace=True in Pandas!
6:32
Stop using inplace=True in Pandas!
Finding text patterns in Pandas with regular expressions
7:04
Finding text patterns in Pandas with regular expressions
New to Python? Join my upcoming courses for Python newbies!
1:54
New to Python? Join my upcoming courses for Python newbies!
Interpolating missing values (NaN) in Pandas data frames
10:50
Interpolating missing values (NaN) in Pandas data frames
Level up your career with Python and Pandas
2:15
Level up your career with Python and Pandas
Three ways to optimize your Pandas data frame's memory footprint
13:37
Three ways to optimize your Pandas data frame's memory footprint
How fast does your Python code run? Find out with timeit
5:28
How fast does your Python code run? Find out with timeit