Comparison of Lists, Tuples, Dictionaries, and Sets in Python

Comparison Item List Tuple Dictionary Set

Type list tuple dict set

Delimiter [ ] ( ) { } { }

Mutable Yes No Yes Yes

Ordered Yes Yes No No

Index Index Index Key No

Separator Comma Comma Comma Comma

Element Requirements None None Key: Value Hash

Element Value None None Key must be hashed Hash

Duplicates Allowed Allowed Keys not allowed Not allowed

Lookup Speed Slow Slow Fast Fast

Add/Delete Speed Tail Fast Not allowed Fast Fast