Duck Typing in File-like Stream API Dry Run in PYTHON

Duck Typing in File-like Stream API is an interactive PYTHON dry run visualizer from the Polymorphism 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.

Duck Typing in File-like Stream API Program Code

class MockStream:
    def write(self, data):
        print(f"Mocking write to buffer: {data}")

def log_message(stream, msg):
    stream.write(msg)

log_message(MockStream(), "App Error!")

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