Python: Find the class wise roll number from a tuple-of-tuples

Python Collections: Exercise-32 with Solution

Write a Python program to find the class wise roll number from a tuple-of-tuples.

Sample Solution:

Python Code:

# Import the defaultdict class from the collections module
from collections import defaultdict

# Create a tuple 'classes' containing class names and roll numbers
classes = (
    ('V', 1),
    ('VI', 1),
    ('V', 2),
    ('VI', 2),
    ('VI', 3),
    ('VII', 1),
)

# Create a defaultdict 'class_rollno' to store lists of roll numbers for each class
class_rollno = defaultdict(list)

# Loop through the tuples in 'classes'
for class_name, roll_id in classes:
    # Append the roll number 'roll_id' to the list associated with class 'class_name' in 'class_rollno'
    class_rollno[class_name].append(roll_id)

# Print the resulting dictionary 'class_rollno'
print(class_rollno)

Sample Output:

defaultdict(<class 'list'>, {'V': [1, 2], 'VI': [1, 2, 3], 'VII': [1]})

Flowchart:

Python Code Editor:

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