Restrict the Range X85359

Statement

Write a function $restrict\_range$ that receives a function operating on floats $f$ , a lower bound $lb$ and an upper bound $ub$ . Then, $restrict\_range$ returns a new function that operates exactly as $f$ when $f(x)$ falls within the closed interval $[lb, ub]$ . Instead of outputs outside that interval, the function produced returns $float("-inf")$.

Sample session

>>> f = restrict_range(lambda x: x * x * x, 1, 1000)
>>> f(1)
1.0
>>> f(-5)
-inf
>>> f(5)
125.0
>>> f(10)
1000.0
>>> f(11)
-inf

Information

Author: Jordi Delgado and José Luis Balcázar
Language: English
Official solutions: Python
User solutions: Python