Final answer:
The Python Employee class should encapsulate the ID, name, and designation of an employee. The ID should be constant throughout the lifecycle of an object, while name and designation should have getter and setter methods. The __str__ method should return a string representation of an employee.
Step-by-step explanation:
Defining a class in Python involves using the keyword class, then indicating the attributes and methods of the object within the class. The Employee class for this hotel scenario should include ID number, name, and designation. The ID number is immutable, so no setter method is needed. The name and designation require getter and setter methods, to provide the ability to change them.
The code might look like:
class Employee: