Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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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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