Apr 24, 2021 · The message “TypeError: unhashable type” appears in a Python program when you try to use a data type that is not hashable in a place in your code that requires hashable …

14 A list is unhashable because its contents can change over its lifetime. You can update an item contained in the list at any time. A list doesn't use a hash for indexing, so it isn't restricted to …

Jul 23, 2025 · In this article, we will dive deep into the intricacies of Unhashable Type List Exception in Python. We will explore why this exception occurs and How to effectively handle …

Sep 13, 2025 · Learn how to solve TypeError: unhashable type 'list' in Python with clear examples and step-by-step solutions for beginners.

Apr 6, 2025 · In Python, data types can be classified as either hashable or unhashable. Understanding the difference between these two is crucial, especially when working with data …

Jun 25, 2025 · Learn what unhashable means, why dictionaries can't be used as keys, and how to fix this common Python error. Simple explanations with real examples.

The reason you're getting the unhashable type: 'list' exception is because k = list[0:j] sets k to be a "slice" of the list, which is logically another, often shorter, list.

Jul 23, 2025 · In this example, the TypeError: Unhashable Type 'Dict' arises when attempting to create a set (set_of_dicts) containing dictionaries directly. Sets require hashable elements, …

Feb 2, 2024 · This article will discuss the TypeError: unhashable type: 'list' and how to fix it in Python. This error occurs when you pass the unhashable objects like a list as a key to the …

Apr 8, 2024 · The Python "TypeError: unhashable type: 'set'" occurs when we use a set as a key in a dictionary or an element in another set. To solve the error, use a frozenset instead …