Operator overloading

• You can redefine the functionality of Python built-in operators to work with your class (like +, -, *, etc).
• For example, to compare cards of different ranks, you define the methods corresponding to __lt__ (<) and __gt__ (>)

class Card():
  
  ranks = ['A', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K']
  
  def __init__(self, rank, suit):
    self.rank = rank
    self.suit = suit
    
  def __lt__(self, other):
    return Card.ranks.index(self.rank) < Card.ranks.index(other.rank)
  
  def __gt__(self, other):
    return Card.ranks.index(self.rank) > Card.ranks.index(other.rank)
    
card1 = Card('2', 'clubs')
card2 = Card('K', 'diamonds')
print(card1 < card2)

True

• All the operators you can overload can be found in this link.