Python Basics · Functions · Lesson 14 of 36
Scope in Python
Concept
Scope in Python
Variables created inside a function are local to it. Variables created outside are accessible everywhere unless shadowed.
To modify a global variable from inside a function, you need the global keyword — without it, assigning to that name just creates a new local variable instead.
- Explain the core idea behind Scope in Python.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Scope in Python. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Predict what the two print statements above output, then run the code.
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
Console