Test your knowledge: Python Modules and Imports

Review

1. What is a Python module?

   A module is a Python file containing definitions and statements that can be imported into another module.
2. After import prices, how do you call add_tax defined in prices.py?

   import prices makes prices available as the module object, so its function is accessed as prices.add_tax(...).
3. Why is prices.rate written with the module prefix in another file?

   A module has its own namespace, so the module prefix identifies where the name comes from.
4. When is __name__ equal to "__main__"?

   When the module is used as the top-level program, Python gives that environment the special name __main__.
5. What does python -m report do when report is an importable module?

   python -m runs the named module as the top-level program.