What is the purpose of the if __name__ == "__main__": statement in Python scripts, and how does it contribute to module reusability?

 Q14: What is the purpose of the if __name__ == "__main__": statement in Python scripts, and how does it contribute to module reusability?

A14:

• Purpose of if __name__ == "__main__": Statement:

  • The if __name__ == "__main__": statement in Python is used to determine if the Python script is being run as the main program or if it is being imported as a module into another script.

• Contribution to Module Reusability:

• When a Python script is imported as a module, the code under if __name__ == "__main__": is not executed. This allows the script to be reusable as a module in other programs without running the code meant for standalone execution.

# Example usage of 'if __name__ == "__main__":'

def some_function():

    print("Function in module")

if __name__ == "__main__":

    # Code here will only run if the script is executed directly

    print("Script executed directly")

This construct ensures that the code within the if __name__ == "__main__": block is executed only when the script is run directly, providing a way to have both reusable modules and standalone executable scripts.