Implement a simple traffic light state machine using a dictionary

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Problem

Implement a simple traffic light state machine using a dictionary. Start at 'green', transition through 'yellow' to 'red' to 'green' using a 'timer' event. Run 4 transitions and print each state.

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