What internal data organization is implemented in the dictionary interface?

The internal organization of data in a Python dictionary is based on a hash table. Key points:

• Dictionary keys are hashed using the __hash__() function to obtain an index in the array.
• Values are stored in array cells along with their keys.
• In case of collisions (when different keys produce the same hash), open addressing with collision resolution is used.
• The dictionary dynamically expands when a certain load factor is reached to maintain operational efficiency.

This provides fast access to elements by key — on average in O(1) time.

Example:

my_dict = {'apple': 1, 'banana': 2}
print(my_dict['apple'])  # Fast access by key