from functools import total_ordering

@total_ordering
class Person(object):

    def __init__(self, name, age):
        self.name = name
        self.age = age

    def is_old(self):
        return self.age > 40

    def __lt__(self,other):
        return self.name < other.name

    def __eq__(self,other):
        return self.name == other.name
        
erich = Person('Erich', 67)
chay = Person('Chay',22)

print('erich < chay',erich < chay)
print('erich <= chay',erich <= chay)
print('erich == chay',erich == chay)
print('erich > chay',erich > chay)
print('erich >= chay',erich >= chay)
print('erich != chay',erich != chay)