Is that set can be key for the dictionary ?

Question

I'm learning #python this was the quiz which was I founded in some python interview questions...... Can anyone tell answer for this?
#sorry for my English

Answer 1

A dictionary key needs to be immutable. A set is not immutable. Hence, a set cannot be a key.

To find the answer, you can also try to create a dictionary with a set as key and see what happens.

https://realpython.com/JUMP_LINK__&&__python__&&__JUMP_LINK-dicts/

Answer 2

Just as addition:
The key must be immutable and hashable
The tuple (1,2,[3,4]) is immutable but not hashable and therefore not a key for dicts.

Answer 3

Sobola Gabriel I don't quite understand what you mean. It is not about "what people say". When you are unsure, just test it in a code and see if it raises an error.

Answer 4

Thanks Lisa

Answer 5

This idea of the type of key for a dictionary is really confusing. Normally from the Python manual itself, Key should be immutable, but then you come across different materials on why/why not a set should be a key. Some will tell you that a set could be changed and others will say what is being taught here. So disturbing really.

Answer 6

Hi Lisa and Dineshkumar and Oma falk

Answer 7

Lisa but then proper understanding of Python literals is very vital to unravel this issues.