nis class to act like a list, except that when append is called, if there a nethods will properly overload append to work this way? item): self.bound: f, item)

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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Consider the following class that inherits from the built-in list class:
class BoundedList (list):
def _init_(self, bound):
list._init_(self)
self.bound = bound
Suppose that we want this class to act like a list, except that when append is called, if there are self.bound items in the list already, the first item in the list gets
removed.
Which of the following methods will properly overload append to work this way?
def append(self, item):
if len(self) >= self.bound:
self.pop(0)
list.append(self, item)
def append (self, item):
if len(self) >= self.bound:
self.remove (0)
list. append (self, item)
def append(self, item):
if len(self) >= self.bound:
self.pop(0)
self.append (item)
def append(self, item):
list. append (self,item)
if len(self) > self.bound:
self.pop(0)
Transcribed Image Text:Consider the following class that inherits from the built-in list class: class BoundedList (list): def _init_(self, bound): list._init_(self) self.bound = bound Suppose that we want this class to act like a list, except that when append is called, if there are self.bound items in the list already, the first item in the list gets removed. Which of the following methods will properly overload append to work this way? def append(self, item): if len(self) >= self.bound: self.pop(0) list.append(self, item) def append (self, item): if len(self) >= self.bound: self.remove (0) list. append (self, item) def append(self, item): if len(self) >= self.bound: self.pop(0) self.append (item) def append(self, item): list. append (self,item) if len(self) > self.bound: self.pop(0)
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