PCAP-31-03 1.5 Create and Use User-Defined Modules and Packages PCAP-31 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   When does Python write a `.pyc` file into the `__pycache__` directory?

   • AEvery time a module is imported, regardless of whether the source has changed.
   • BOnly when the module is run directly as a script.
   • CWhen a module is imported and no valid compiled bytecode exists for the current source.
   • DOnly when the module is imported using the `from ... import ...` syntax.
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2. 2application · medium

   A developer has a custom module `utilities.py` stored in `/home/developer/scripts`. When running a Python script from `/home/developer/projects`, the statement `import utilities` raises a `ModuleNotFoundError`. The developer does not want to permanently alter the system environment. What is the most direct way to make the import work for the current script?

   • AAdd `sys.path.append('/home/developer/scripts')` before the import statement in the script
   • BCreate an `__init__.py` file in `/home/developer/scripts`
   • CRename the module to `_utilities.py`
   • DCopy `utilities.py` into the `__pycache__` directory of the project
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4. 3expert · medium

   A developer has a module `tool.py` with the following code: ```python def run(): print("Running tool") if __name__ == '__main__': run() ``` The developer also has a script `main.py` that imports `tool` and calls `tool.run()`. The developer wants to add a test that verifies `run()` is called when `tool.py` is executed directly. Which approach will work?

   • ARename the `run` function to `_run`.
   • BExecute `tool.py` as a subprocess and capture its output.
   • CImport `tool` in the test and call `tool.run()`.
   • DSet `tool.__name__ = '__main__'` before importing.
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5. 4foundation · easy

   Given a file named `geometry.py` in the same directory as your script, which statement correctly imports the `circle_area` function from it?

   • Aimport geometry.circle_area
   • Bfrom circle_area import geometry
   • Cfrom geometry import circle_area
   • Dimport circle_area from geometry
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6. 5foundation · easy

   In a file `mymod.py`, what is the value of `__name__` when the file is imported as a module?

   • AThe string `'__main__'`
   • BThe value `None`
   • CThe full path to the file, such as `'/path/to/mymod.py'`
   • DThe string `'mymod'`
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