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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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Below is code that defines a Quadrilateral class (a shape with four sides), which has four floating point instance variables that correspond to the four side lengths: import math class Quadrilateral: definit__(self, a,b,c,d): self.a = a self.b = b self.c = C self.d = d def perimeter (self): return self.a + self.b + self.c + self.d def area(self): print("Not enough information") def_lt__(self, other): return self.perimeter() < other.perimeter()
Transcribed Image Text:Below is code that defines a Quadrilateral class (a shape with four sides), which has four floating point instance variables that correspond to the four side lengths: import math class Quadrilateral: definit__(self, a,b,c,d): self.a = a self.b = b self.c = C self.d = d def perimeter (self): return self.a + self.b + self.c + self.d def area(self): print("Not enough information") def_lt__(self, other): return self.perimeter() < other.perimeter()
Define a Rectangle class that inherits from Quadrilateral, with the following methods: _init__(self, length, width): Override the _init_ method so that the Rectangle constructor only takes in two floating point numbers. Your constructor for Rectangle should only consist of a call to Quadrilateral's constructor: don't define any new instance variables. • Override the area method to return the correct area for a rectangle (width*length). Remember: you don't have self.width or self.length instance variables, so you must use the instance variables from Quadrilateral to do this. Do not override the perimeter method: if your init is correct then the inherited method from Quadrilateral should work as-is. Examples: >>> isinstance (Rectangle(4, 6), Quadrilateral) True >>> Rectangle(6, 7).area() 42
Transcribed Image Text:Define a Rectangle class that inherits from Quadrilateral, with the following methods: _init__(self, length, width): Override the _init_ method so that the Rectangle constructor only takes in two floating point numbers. Your constructor for Rectangle should only consist of a call to Quadrilateral's constructor: don't define any new instance variables. • Override the area method to return the correct area for a rectangle (width*length). Remember: you don't have self.width or self.length instance variables, so you must use the instance variables from Quadrilateral to do this. Do not override the perimeter method: if your init is correct then the inherited method from Quadrilateral should work as-is. Examples: >>> isinstance (Rectangle(4, 6), Quadrilateral) True >>> Rectangle(6, 7).area() 42
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