#dict

Python Easy Theory

Sign in to star

Dictionary operations, iteration, and methods

Dictionaries map keys to values and are optimized for fast lookup, update, and membership by key.

• Iterate with keys, values, or items
• Lookups are usually average O(1)
• Methods like `get` make code safer

#collections #dict #python

Dictionary operations, iteration, and methods

Reveal full answer

Python Medium Theory

Sign in to star

Nested dictionaries, get, setdefault, and update

Nested dictionaries represent hierarchical data, and helper methods like `get`, `setdefault`, and `update` make access and merging cleaner.

• get avoids immediate KeyError
• setdefault initializes missing keys
• update merges another mapping in place

#dict #patterns #python

Nested dictionaries, get, setdefault, and update

Reveal full answer