Strings, numbers (integers and floats alike), tuples, and built-in singleton objects (True, False, and None) are all common types to use as keys. A given key is unique to a given dictionary ...

In the above example we’re using simple strings as our match targets, but more complex matches are possible. In fact, the chief use case for structural pattern matching is to match patterns of ...

Also read: How to use lists in Python This is not an array, however. That’s because an array is a data structure that uses an “index” or “key” to store each value.