Profiler Decorator

mediumpy_functional

Implement profiler(func) — a decorator that records, as attributes on the wrapped function:

calls — the number of invocations during the most recent top-level call (recursive calls count; the counter resets when a new outermost call begins),
last_time_taken — wall-clock seconds the most recent top-level call took.

Preserve the original function's metadata (__name__, __doc__, ...) with functools.wraps.

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Hint 1

Track recursion depth on the wrapper; reset `calls` to 0 only when entering at depth 0 (a new top-level call).

Hint 2

Record `last_time_taken` when the depth returns to 0; use functools.wraps to keep the function's metadata.