Chapter 10, Problem 7SA

Explanation of Solution

The “__str__” method:

• • It is used to display an object’s state.
• • The object’s state is the value of the object’s attribute.
• • This method returns a string containing the object’s state.
• • When an object is passed as an argument to the print function, this “__str__” method is automatically called.
• • It is also called when an object is passed as an argument to the built-in “str” function.

Example:

#define the class Example_class

class Example_class:

  #init method for the class

         def __init__(self, id):

              #assign for id

              self...