Python Decorators With Timing | Dataford Interview Questions

What is a decorator in Python? Give an example to time a function.

Implement timed(source), where source is a string containing a function definition decorated with @timed and a call to that function. Execute the source and return a map containing the function's return value and the output prefix produced by the timing decorator. If the function raises an exception, return its exception type and message while still recording the timing output.

The decorator must support positional and keyword arguments, preserve the wrapped function's name, and report timing in the form <name> took ...s.

Constraints

source contains one decorated function and one call to that function
The function accepts only JSON-compatible arguments
The function may return any JSON-compatible value
The function may raise a standard exception
Timing output begins with <function_name> took

Function Signature

def timed(source):

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Problem

What is a decorator in Python? Give an example to time a function.

The decorator must support positional and keyword arguments, preserve the wrapped function's name, and report timing in the form <name> took ...s.

Constraints

source contains one decorated function and one call to that function
The function accepts only JSON-compatible arguments
The function may return any JSON-compatible value
The function may raise a standard exception
Timing output begins with <function_name> took

Function Signature

def timed(source):

Your question is Python Decorators With Timing. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.