Python TypeError: unhashable type: 'list'

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[-minutepython]

Hashable : int, float, str, tuple, and Booleans
Unhashable : set, list and dict

[DhavalAhir]

A = set() #Empty Set

element = (5, 6, [ "Apple" ])
A.add(element)

TYPEERROR : unhashable type list.

The reason is tuple is immutable but in our case tuple element variable is not immutable.

We can access element[2] and then element[2].append("banana")
So when we are adding this the list inside tuple cannot be a hashable.