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The Event Broadcaster
A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- medium
- Seniority
- mid, senior
Problem
A notification system needs to allow components to subscribe to named events and receive callbacks when those events fire. Implement an EventEmitter class with on (subscribe), emit (fire), and off (unsubscribe) methods. Multiple listeners can be registered for the same event.
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