Exercise: decorators decorator

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Write a function that gets a functions as attribute and returns a new functions while memoizing (caching) the input/output pairs. Then write a unit test that checks it. You probably will need to create a subroutine to be decoratorsd.

• Write tests for the fibonacci functions.
• Implement the decorators decorator for a function with a single parameter.
• Apply the decorator.
• Run the tests again.
• Check the speed differences.
• or decorate with tron to see the calls...