In addition to a value, some objects have ahash value, which means they can be used as dictionary keys (and stored insets). The functionhash(a)returns the objecta's hash value, a number based on the object's value. The hash of an object must remain the same for the lifetime of t...
We have seenbeforethat there are differences between mutable and immutable types in Python. Built-in immutable types have always a hash method, while mutable types don't. However, this leaves outside custom defined classes. By default, all instances of custom classes will have a hash value def...