Dictionaries are one of Python's most important and useful built-in data types. They provide a mutable collection of key-value pairs that lets you efficiently access and mutate values through their corresponding keys.
The .__dict__ special attribute is a dictionary that maps attribute names to their corresponding values in Python classes and objects. This implementation makes attribute and method lookup fast and efficient in object-oriented code.
Python's dictionaries have several key characteristics: they're mutable, dynamic, efficient, and ordered - which makes them an invaluable tool in programming.
Dictionaries come in handy for tasks such as processing CSV and JSON files, working with databases, and loading configuration files.
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