Dictionaries and File Operations in Python

Dictionaries are a core and versatile data structure in Python. Also known as hash tables in other languages, dictionaries allow storing data in key-value pairs that provide lightning-fast lookup times.

What Are Dictionaries?

A Python dictionary consists of keys and values:

students = {"Sarah": 90, "Jerry": 75, "David": 82}

The student names are the keys, while the test scores are the values. You can access the values quickly by referring to the key:

print(students["Sarah"]) # Prints 90

This syntax makes …

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