How to Fix: KeyError in Python (Dictionaries and Pandas)
A KeyError is Python telling you: “You asked me to look for a key that doesn’t exist.” Understanding what a KeyError is and how to…
How to Fix: ModuleNotFoundError: No module named ‘pandas’
You’re excited to start your first data science project, you type import pandas as pd, run your script, and… crash. The error message reads ModuleNotFoundError:…
How to Fix: NameError: name ‘x’ is not defined in Python
Seeing NameError: name is not defined? This is Python’s most common typo error. Learn the 3 main causes and how to fix them instantly.
How to Fix: IndentationError: unexpected indent in Python
Welcome to the most “Pythonic” error you will ever see. If you’ve come from another language like JavaScript or Java, this error might seem strange,…
How to Fix: TypeError: ‘str’ object is not callable in Python
TypeError: ‘str’ object This is one of the most common—and most confusing—errors for new Python developers. You see it, and you think, “What’s a ‘callable’?”…
How to Fix: IndexError: list index out of range in Python
If you’re working with Python lists, you will likely encounter the “IndexError: list index out of range” error. It’s practically a rite of passage. This…
