Define a function called get_predecessor() which takes a Node object and a value as parameters. The function should search the chain of nodes starting at the parameter node and returns the node which comes before the node containing the parameter value. If the parameter value is NOT in the chain of nodes or the parameter value is in the first node of the chain, the function returns None. Test: x = Node('hello') y = Node('world') z = Node('goodbye') x.set_next(y) y.set_next(z) print(get_predecessor(x, 'goodbye')) Output: world Test: x = Node('hello') y Node('world') z = Node('goodbye') x.set_next(y) y.set_next(z) print(get_predecessor(x, 'hello')) Ouput: None

Define a function called get_predecessor() which takes a Node object and a value as parameters. The function should search the chain of nodes starting at the parameter node and returns the node which comes before the node containing the parameter value. If the parameter value is NOT in the chain of nodes or the parameter value is in the first node of the chain, the function returns None. Test: x = Node('hello') y = Node('world') z = Node('goodbye') x.set_next(y) y.set_next(z) print(get_predecessor(x, 'goodbye')) Output: world Test: x = Node('hello') y Node('world') z = Node('goodbye') x.set_next(y) y.set_next(z) print(get_predecessor(x, 'hello')) Ouput: None

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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