defaultdict Marks by Grade Dry Run in PYTHON

defaultdict Marks by Grade is an interactive PYTHON dry run visualizer from the Collection programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

defaultdict Marks by Grade Program Code

from collections import defaultdict

records = [("A", 92), ("B", 78), ("A", 88), ("C", 65)]
grade_marks = defaultdict(list)

for grade, mark in records:
    grade_marks[grade].append(mark)

print(dict(grade_marks))

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