Dictionaries

1student = {
2    "name": "Alice",
3    "age": 21,
4    "major": "Computer Science",
5    "gpa": 3.8
6}
7 
8# Access by key
9print(student["name"])    # Alice
10 
11# Safe access with .get()
12print(student.get("email", "Not found"))  # Not found
13 
14# Add/update
15student["email"] = "alice@example.com"
16student["gpa"] = 3.9
17 
18print(student)

1scores = {"math": 95, "science": 88, "english": 92}
2 
3# Loop through keys
4for subject in scores:
5    print(subject)
6 
7# Loop through values
8for score in scores.values():
9    print(score)
10 
11# Loop through key-value pairs
12for subject, score in scores.items():
13    print(f"{subject}: {score}")