Encapsulation

Main idea

Hide internal state and expose controlled access.

Tip

Use validation in setters.

Watch out

Directly mutating internal fields.

Read this next

Encapsulation is used in many real programs. Right now you are in Object-Oriented Programming.

Core idea:
Hide internal state and expose controlled access.

Read the example code on this page. Then write your own short version.

Tip:
Use validation in setters.

Watch out for:
Directly mutating internal fields.

Your challenge:
Wallet class with secure balance updates.

Use the editor in the challenge lab. When your output looks correct and there is no error, press the green button to unlock the next topic.

Example code

Copy this example if it helps. Change it so it matches Encapsulation.

# Topic: Encapsulation
def main():
    sample = "edit me"
    # TODO: apply Encapsulation concept here
    result = sample
    print("Result:", result)

if __name__ == "__main__":
    main()

Challenge

Wallet class with secure balance updates.

Before you can finish: your output should include at least 16 characters; at least 1 non-empty line(s); no crash traceback—fix errors until the program runs cleanly.

Use Run. Read the output. Change your code until the task is done.

Starter reference

# Challenge starter for Encapsulation
def solve():
    # Write your solution here
    pass

print("Update solve() and run")

Your code

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