Nov 7, 2012 · You're trying to use a dict as a key to another dict or in a set. That does not work because the keys have to be hashable. As a general rule, only immutable objects (strings, integers, floats, …

Jul 23, 2025 · When you attempt to use a dictionary as a key in another dictionary or as an element in a set, you'll encounter the TypeError: Unhashable Type 'Dict' exception.

Dec 6, 2025 · Learn how to resolve the Python TypeError: unhashable type 'dict' error by understanding hashability and converting dictionaries to immutable types like tuples.

The TypeError: unhashable type: 'dict' error arises because dictionaries are mutable. To use dictionary-like data as keys or set elements, you must use an immutable representation: frozenset (if you need …

Feb 1, 2026 · The TypeError: unhashable type: 'dict' occurs because dictionaries are mutable and cannot be hashed. By converting dictionaries to hashable types like tuples, frozensets, or serialized …

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

Jan 25, 2026 · Learn how to fix the TypeError unhashable type error in Python. Understand what hashability means, why lists and dicts cannot be dictionary keys or set members, and how to solve …

Nov 23, 2025 · Sometimes while executing a python code, we might run into an error like TypeError: unhashable type: ‘dict’ . For example, if we try to hash a dictionary by trying to use it as a set element …

Apr 6, 2023 · In Python, dictionary keys must be a hashable type such as a string, a tuple, a boolean, or an integer. A dictionary is not hashable, so the error is raised. To resolve this error, you need to …

Feb 10, 2025 · Similarly, if we use a dictionary object as a key in another dictionary, Python will raise the error, "TypeError: unhashable type: 'dict'". In this Python tutorial, we will discuss this error in detail …