Python Errors

Python can’t find the library you imported. Here’s how to tell whether you need to install it, rename it, or fix your environment.

You asked a list for an item it doesn’t have. Here’s the counting rule behind it and the three situations where it happens.

Python won’t add a number to a piece of text. Here’s why, and the two ways to fix it in one line.

Python says a name isn’t defined, but you can see it right there. Here are the three reasons this happens and how to tell them apart.

Python says invalid syntax and points at a line that looks fine. Here’s why the real mistake is usually one line above, and the four things that cause it.

Python says your block isn’t indented. Here’s exactly what that means, the two things that cause it, and how to fix it in under a minute.