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Implement and test the following BST method: def preorder_r(self): “””

Implement and test the following BST method: def preorder_r(self): “”” ——————————————————- Prints the contents of the tree in preorder order. (Recursive algorithm.) Use: bst.preorder_r() ——————————————————- Postconditions: prints: The contents of the tree are printed preorder. Each value is printed on its own line. ——————————————————- “”” Add the method to your bst_linked.py file in your data_structures […]

import java.text.DecimalFormat

import java.text.DecimalFormat; class Book { private int isbnNum; private String title; private String author; private String yearPublished; private String publisher; private String WebSite; private double salesPrice; /*** * Constructor * * number * title * author * yearPublished * publisher * price */