Nested pattern matching in Python 3.10a6

pattern_match_example-nesting.py

class Card:
  def __init__(self, id, name, supertype, subtype):
    self.id = id
    self.name = name
    self.supertype = supertype
    self.subtype = subtype


def play_card(card):
  match card:
    case Card(supertype='Pokemon') as pokemon:
      match pokemon:
        case Card(subtype='Basic'):
          print('Play to bench')
        case (Card(subtype='Stage 1') | Card(subtype='Stage 2')):
          print('Play on top of another Pokemon card')
    case Card(supertype='Trainer') as trainer:
      match trainer:
        case Card(subtype='Item'):
          print('Play as many items as you wish')
        case Card(subtype='Supporter'):
          print('Only one per turn')

charizard = Card('ex3-100', 'Charizard', 'Pokemon', 'Stage 2')
lapras = Card('ex3-103', 'Lapras', 'Pokemon', 'Basic')
muscle_band = Card('xy1-121', 'Muscle Band', 'Trainer', 'Item')
lysandre = Card('xy1-1', 'Lysandre', 'Trainer', 'Supporter')

play_card(charizard) # Prints Play on top of another Pokemon card
play_card(lapras) # Prints Play to bench
play_card(muscle_band) # Prints Play as many items as you want
play_card(lysandre) # Prints Only one per turn