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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def points_possible(self, include_hidden=False):
 """Return the total points possible for this project."""

        return sum([test_case.points for testable in self.testables
                    for test_case in testable.test_cases
                    if include_hidden or not testable.is_hidden])