PYTHON PROGRAM • FUNCTIONAL & ADVANCED PYTHON

Create a Function Decorator in Python

Learn create a function decorator in python with a short, executable Python example.

AdvancedDecoratorClosure

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
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COMPLETE PYTHON PROGRAM

Complete Python implementation

python-decorator.py
Open in compiler
def uppercase(function):
    def wrapper():
        return function().upper()
    return wrapper

@uppercase
def message():
    return 'keep learning'

print(message())

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

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0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Initialize the sample values used to create a function decorator.
  2. Apply Decorator and Closure to compute the required result.
  3. Display the result for create a function decorator and compare it with the documented sample output.

This example of create a function decorator computes the result directly from the prepared sample data. It demonstrates Decorator and Closure and prints a deterministic result that can be checked against the sample output.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

Check this

For create a function decorator, keep the data shape and value types consistent with Decorator.

Check this

Keep every dependent statement inside the correct indented Python block.

Check this

Verify the final Decorator and Closure result against the sample before trying new data.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.