def tracer(func):
def wrapper(*args, **kwargs):
result = func(*args, **kwargs)
print('%s(%r,%r)->%r'%(func.__name__,args,kwargs,result))
return result
return wrapper
@tracer
def fibonacci(n):
if n in (0,1):
return n
return (fibonacci(n-1)+fibonacci(n-2))
fibonacci(3)
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