ChainMap Update First Dictionary Dry Run in PYTHON

ChainMap Update First Dictionary 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.

ChainMap Update First Dictionary Program Code

from collections import ChainMap

first = {"a": 1}
second = {"b": 2}
chain = ChainMap(first, second)

chain["c"] = 3
chain["a"] = 10

print(chain)
print(first)

View the complete Collection programs page.