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__main__ 2 is a medium quant interview question on language knowledge in Python.
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This is a medium-difficulty Python language question that probes whether you understand how the -m flag works and what happens when the Python interpreter runs a module as a script. It's the kind of question that separates candidates who have read the documentation from those who rely on guesswork.
To answer it correctly, you need to know how Python locates and executes modules, what __main__ means in different contexts, and how the module search path behaves when you invoke the interpreter with -m. The answer hinges on understanding module initialization, the presence or absence of certain files, and what code actually runs at entry time.
-m flag and module search semantics__name__ attribute and if __name__ == "__main__": pattern__init__.py files