script_15.py - Dictionary Iteration

Code

#!/usr/bin/env python3
"""Dictionary iteration"""

student_scores = {
    "Alice": 95,
    "Bob": 87,
    "Charlie": 92,
    "Diana": 88
}

for name, score in student_scores.items():
    print(f"{name}: {score}")

Explanation

Line 4-9: Dictionary definition - {} syntax creates a dictionary (dict type) - Dictionary stores key-value pairs - Keys: "Alice", "Bob", etc. (strings) - Values: 95, 87, etc. (integers) - : separates key from value - , separates pairs - student_scores is dict type

Line 11: for name, score in student_scores.items(): - .items() is a dict method that returns key-value pairs - Returns an iterable of tuples: ("Alice", 95), ("Bob", 87), etc. - Tuple unpacking: name, score gets both values from each tuple - name gets the key (string) - score gets the value (integer) - Iterates through all dictionary entries - Order is insertion order (Python 3.7+)

Line 12: print(f"{name}: {score}") - Both variables available from tuple unpacking - Prints each key-value pair