Dictionaries in Python

Dictionaries in Python are used to store data in key-value pairs. Each key is unique and maps to a corresponding value. Dictionaries are mutable, dynamic, and provide fast access to values using keys.

Creating a Dictionary

Accessing Values

Important Points

• Dictionaries store key-value pairs
• Keys must be unique, values can be of any type
• Keys must be immutable types (e.g., strings, numbers, tuples)
• Dictionaries provide fast lookup compared to lists
• In Python 3.7+, dictionaries maintain the insertion order