Discuss the properties of Dictionary Keys.

Question :

Discuss the properties of Dictionary Keys.

There are few properties which should be considered while using dictionary keys:
(a) More than one entry per key is not allowed ( no duplicate key is allowed ).
(b) The values in the dictionary can be of any type while the keys must be immutable like numbers, tuples, or strings.
(c) Dictionary keys are case sensitive. Same key name but with the different case are treated as different keys in Python dictionaries.