def __getitem__(self, lhs: Union[int. list[bool]]) -> Union[float, Runner]: The function should take a list[bool] and will return a new Runner object containing only the filtered values

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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in python

class name: Runner

function within a class: 

  • def __getitem__(self, lhs: Union[int. list[bool]]) -> Union[float, Runner]:
  • The function should take a list[bool] and will return a new Runner object containing only the filtered values
  • Example :
    • c = Runner([1.0, 2.0, 3.0, 4.0, 2.0, 1.0])
    • filter = c > 2.0
    • print(filter) # Output: [False, True, True, False, False])
    • d = c[filter]
    • print(d) # Output: Runner([3.0, 4.0])
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