# Step 1: Define a class
class Person:
def __init__(self, name, age):
"""
The constructor method initializes a person object with a name and an age.
"""
self.name = name
self.age = age
def __repr__(self):
"""
Provides a string representation of the Person object.
Useful for displaying the object in a readable format.
"""
return f"Person(name={self.name}, age={self.age})"
def __eq__(self, other):
"""
Defines equality between two Person objects.
Two objects are considered equal if they have the same name and age.
"""
return self.name == other.name and self.age == other.age
def __hash__(self):
"""
Generates a unique hash value based on the name and age.
This allows Person objects to be used in hash-based collections like sets.
"""
return hash((self.name, self.age))
# Step 2: Create instances of the class
person1 = Person("Robert", 45) # Creating an instance with name "Robert" and age 45
person2 = Person("Jennifer", 38) # Creating an instance with name "Jennifer" and age 38
person3 = Person("Robert", 45) # Duplicate of person1 (same name and age)
person4 = Person("Sharon", 51) # Another unique person instance
# Step 3: Add objects to a set
# Since sets don't allow duplicate values, person3 won't be included
people_set = {person1, person2, person3, person4}
# Print the set to observe the unique entries
print(people_set)
'''
run:
{Person(name=Robert, age=45), Person(name=Jennifer, age=38), Person(name=Sharon, age=51)}
'''
