Everything else is ready: study the parts, the key terms and the quiz below.
Modules and Packages
Split code across files and import it; use other people's packages.
In this lesson8 parts
- 01Our functions, in a file
- 02What import does
- 03The standard library
- 04Installed packages
- 05`__name__` and the main guard
- 06Packages
- 07Where imports mislead
- 08Recap, your challenge, and next
Key terms
The words this lesson introduces, each in one line. The module’s glossary collects them all.
__name__- A module's name;
"__main__"for the file being run.if __name__ == "__main__":guards the lines that should run only when the file is run. - import
- Running a module once and binding a name to it.
- module
- A Python file that other code imports.
- package
- A folder of modules, imported with dotted names:
review_stats.text_tools. - standard library
- The modules that come with Python:
math,pathlib,csv,json,importlib.
Quiz 5 questions
Your first pick on each question is the one that counts, and a right one earns a coin. Getting one wrong here is how the lesson sticks.
Practice
Problems to solve in your own notebook. Each states the problem, not the steps: working out the steps is the exercise. Level A applies the lesson, B combines it with earlier ones, C stretches it.
The self-checking notebook for this lesson is Notebook 1 · Modules and Packages.
Common mistakes
What you will see when it goes wrong, why it happens, and the fix.
Where it’s used
Where this lesson’s ideas turn up in real work.