Type hinting produces "TypeError: type object is not subscriptable"

Question

w: dict[int, int] = {1:2, 2:3, 69: 420} produces the error message in the title. Why won't specific type hints work for my dictionaries and lists?

@jonrsharpe Yes. Why didn't DDG put that as the top result when I searched for the error? — cjm, Feb 06 '21 at 00:05

score 1 · Accepted Answer · answered Feb 05 '21 at 23:57

1

As of python3.8, you need to import their respective classes from the typing module.

from typing import Dict, List, Set

w: Dict[int, int] = {1:2, 2:3, 69:420}

Note the capital D in Dict.

answered Feb 05 '21 at 23:57

cjm

This is well known and very possibly covered in other questions. There's no need for a self-answered question. – Pranav Hosangadi Feb 05 '21 at 23:58
For example, the topic is comprehensively covered here: https://stackoverflow.com/questions/37087457/difference-between-defining-typing-dict-and-dict – Pranav Hosangadi Feb 05 '21 at 23:59
The question you linked did not appear in the Google results for the error nor in the suggested duplicates box when typing the question. – cjm Feb 06 '21 at 00:02

1 Answers1