In Python, you have the opportunity either to use a predefined function/method or to conduct a user-defined function/method.

In Python, you have the opportunity either to use a predefined function/method or to conduct a user-defined function/method. In this discussion, provide at least three criteria that would be used to develop an appropriate method of your choice and the rationale behind the selection of these criteria. Then provide an example of your method declaration and return type. Provide at least one reference to support your findings.