How is the dictionary structure implemented at a technical level?

In Python, a dictionary is implemented as a hash table. Keys are processed through a hash function that converts them into an array index where the corresponding value is stored. In case of collisions (when different keys have the same hash), open addressing or chaining methods are used to resolve conflicts. This provides quick access to elements by key with an amortized complexity of O(1).

Example:

my_dict = {'apple': 1, 'banana': 2}
print(my_dict['apple'])  # Outputs 1

Here, 'apple' is hashed, and the value 1 is retrieved at the resulting index.