Web Reference: A Python dictionary is a collection of items, similar to lists and tuples. However, unlike lists and tuples, each item in a dictionary is a key-value pair (consisting of a key and a value). The dictionary is an unordered collection that contains key:value pairs separated by commas inside curly brackets. Dictionaries are optimized to retrieve values when the key is known. May 30, 2025 · This Python dictionary exercise contains 20 dictionary coding questions, programs, and challenges to solve. Solutions and hints are provided for each question, and all solutions have been tested on Python 3.
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