Python Key Parameter Guide

In Python, the key parameter is used to specify the sorting rule. In some sorting functions or methods, you can customize the sorting rule by specifying the key parameter. For example, when sorting a list using the sorted() function, you can define the sorting rule by specifying a function with the key parameter. Additionally, when using the max() and min() functions, you can specify a function with the key parameter to define the comparison rule. By using the key parameter, we can achieve sorting in a way different from the default sorting rule.