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Os [118] #@title Interval intersection class Interval: def _init__(self, start, end): self.start = start self.end = end Os def interval_and(self, other): """Intersection; returns an interval, or None.""" if other.end < self.start or other.start > self.end: return None x0 = max(self.start, other.start) x1 = min(self.end, other.end) return Interval(x0, x1) def _and_(self, other): return self.interval_and (other) # Tests 10 points. wwww wwwwwwww assert Interval(3, 10) & Interval(6, 20) == Interval(6, 10) assert Interval(3, 4) & Interval(5, 6) is None [T] TypeError Traceback (most recent call last) in () 1 #23 Tests 10 points. 2 ----> 3 assert Interval(3, 10) & Interval(6, 20) == Interval (6, 10) 4 assert Interval (3, 4) & Interval (5, 6) is None TypeError: unsupported operand type(s) for &: 'Interval' and 'Interval'

Os [118] #@title Interval intersection class Interval: def _init__(self, start, end): self.start = start self.end = end Os def interval_and(self, other): """Intersection; returns an interval, or None.""" if other.end < self.start or other.start > self.end: return None x0 = max(self.start, other.start) x1 = min(self.end, other.end) return Interval(x0, x1) def _and_(self, other): return self.interval_and (other) # Tests 10 points. wwww wwwwwwww assert Interval(3, 10) & Interval(6, 20) == Interval(6, 10) assert Interval(3, 4) & Interval(5, 6) is None [T] TypeError Traceback (most recent call last) in () 1 #23 Tests 10 points. 2 ----> 3 assert Interval(3, 10) & Interval(6, 20) == Interval (6, 10) 4 assert Interval (3, 4) & Interval (5, 6) is None TypeError: unsupported operand type(s) for &: 'Interval' and 'Interval'

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Interval Selection: Please help me with this TypeError
Os [118] #@title Interval intersection class Interval: def _init__(self, start, end): self.start = start self.end = end Os def interval_and(self, other): """Intersection; returns an interval, or None.""" if other.end < self.start or other.start > self.end: return None x0 = max(self.start, other.start) x1 = min(self.end, other.end) return Interval(x0, x1) def _and_(self, other): return self.interval_and (other) # Tests 10 points. wwww wwwwwwww assert Interval(3, 10) & Interval(6, 20) == Interval(6, 10) assert Interval(3, 4) & Interval(5, 6) is None [T] TypeError Traceback (most recent call last) <ipython-input-130-2f2a2912fd36> in <cell line: 3>() 1 #23 Tests 10 points. 2 ----> 3 assert Interval(3, 10) & Interval(6, 20) == Interval (6, 10) 4 assert Interval (3, 4) & Interval (5, 6) is None TypeError: unsupported operand type(s) for &: 'Interval' and 'Interval'
Transcribed Image Text:Os [118] #@title Interval intersection class Interval: def _init__(self, start, end): self.start = start self.end = end Os def interval_and(self, other): """Intersection; returns an interval, or None.""" if other.end < self.start or other.start > self.end: return None x0 = max(self.start, other.start) x1 = min(self.end, other.end) return Interval(x0, x1) def _and_(self, other): return self.interval_and (other) # Tests 10 points. wwww wwwwwwww assert Interval(3, 10) & Interval(6, 20) == Interval(6, 10) assert Interval(3, 4) & Interval(5, 6) is None [T] TypeError Traceback (most recent call last) <ipython-input-130-2f2a2912fd36> in <cell line: 3>() 1 #23 Tests 10 points. 2 ----> 3 assert Interval(3, 10) & Interval(6, 20) == Interval (6, 10) 4 assert Interval (3, 4) & Interval (5, 6) is None TypeError: unsupported operand type(s) for &: 'Interval' and 'Interval'
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