Decorators

Main idea

Decorator wraps a function to add behavior before/after.

Tip

Use functools.wraps.

Watch out

Losing original function metadata.

Read this next

You will study Decorators. It belongs to the Advanced Engineering phase.

Remember this:
Decorator wraps a function to add behavior before/after.

Practice step by step. Do not rush. Each run should show you something new.

Tip:
Use functools.wraps.

Avoid this:
Losing original function metadata.

Your challenge:
Timing decorator for any function.

Go to the challenge lab below. Fix errors until the output looks right. Then press the green button to complete the topic.

Example code

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

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

if __name__ == "__main__":
    main()

Challenge

Timing decorator for any function.

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 Decorators
def solve():
    # Write your solution here
    pass

print("Update solve() and run")

Your code

The first Run may load Python in your browser (one-time). Later runs are faster.

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