def calculate_valid_cards(self):
'''Calculates which cards can be played on layout.'''
# If layout is not active then only card of rank 7 is valid
if len(self.cards) == 0:
valid_cards = [Card(7, self.suit)]
else:
valid_cards = [
self.get_highest_playable_card(),
self.get_lowest_playable_card()
]
return [c for c in valid_cards if c is not None]
def get_lowest_playable_card(self):
'''Returns card instance for the lowest playable card'''
lowest_playable_card = None
lowest_rank = self.get_lowest_card_rank()
if lowest_rank:
lowest_playable_rank = lowest_rank - 1
if lowest_playable_rank in RANKS:
lowest_playable_card = Card(lowest_playable_rank, self.suit)
return lowest_playable_card
def get_highest_playable_card(self):
'''Returns card instance for the highest playable card'''
highest_playable_card = None
highest_rank = self.get_highest_card_rank()
if highest_rank:
highest_playable_rank = highest_rank + 1
if highest_playable_rank in RANKS:
highest_playable_card = Card(highest_playable_rank, self.suit)
return highest_playable_card
