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Dictionaries in Python

  • Python dictionaries are a built-in data type that stores key-value pairs for efficient data retrieval.
  • dict() and {} can create dictionaries in Python. Use {} for concise syntax and dict() for dynamic creation from iterable objects.
  • .__dict__ is a special attribute in Python that holds an object’s writable attributes in a dictionary.
  • Python dict is implemented as a hashmap for fast key lookups.
  • Dictionaries in Python are mutable, dynamic, efficient, and ordered.
  • The keys of a dictionary need to be hashable and unique, and values can be of any Python type, including other dictionaries.
  • Dictionaries come in handy when processing CSV and JSON files, working with databases, loading configuration files, and more.
  • It’s important to note that dictionaries are collections of pairs. You need to insert a key with its corresponding value.
  • Python’s dictionaries are a fundamental part of Python and used in core concepts like scopes and namespaces.
  • Dictionaries in Python have many characteristics like being dynamic, mutable, efficient, and ordered.

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