How to Fix: TypeError: unhashable type: ‘list’
This error is a core Python concept. The TypeError unhashable type message means you tried to use something “changeable” (mutable) in a place that requires…
How to Fix: RuntimeError: CUDA out of memory (PyTorch & Hugging Face)
This is the most common—and most frustrating—error when you start working with real AI models. It means: “This AI model is too big to fit…
How to Fix: TypeError: ‘str’ object does not support item assignment
This error means you tried to change a single character inside a string. If you see a TypeError str item assignment in Python, it’s an…
How to Fix: AttributeError: ‘dict’ object has no attribute ‘x’
This is a classic “dot vs. bracket” confusion. If you’ve ever encountered an AttributeError dict object message in your code, you’re not alone. You have…
How to Fix: TypeError: ‘NoneType’ object is not callable
The NoneType object is not callable error means you are trying to “call” a variable (by putting () after it) as if it were a…
How to Fix: TypeError: unsupported operand type(s) for +: ‘int’ and ‘str’
This error is the opposite of the common string concatenation error. It means you tried to do math (+), but one of your items was…
How to Fix: AttributeError: ‘str’ object has no attribute ‘x’
This is the twin error to AttributeError: 'list' object has no attribute ‘x’. The AttributeError str object means you are trying to use a method…
How to Fix: RecursionError: maximum recursion depth exceeded
This error means a function is calling itself over and over again, in an infinite loop, until it hits a safety limit set by Python…
How to Fix: ValueError: not enough values to unpack (expected X, got Y)
This error happens when you use tuple unpacking (assigning multiple variables at once) but the number of variables on the left doesn’t match the number…
How to Fix: TypeError: ‘NoneType’ object is not subscriptable
This error is a close cousin to AttributeError: 'NoneType', In Python, the error message NoneType object is not subscriptable usually appears if you try to…
