如何在2D阵列上使用pop？

Question

I am trying to make a card deck of 30 cards and take out one at a time and divide them between two players by using pop but I don't know why pop isn't working, why isn't my pop working

I have tried to use .remove but my teacher says pop must be used and I don't know why pop isn't working

card_deck = [["yellow",1],["yellow",2],["yellow",3],["yellow",4],    ["yellow",5],["yellow",6],["yellow",7],["yellow",8],["yellow",9],     ["yellow",10],
["red",1],["red",2],["red",3],["red",4],["red",5],["red",6],["red",7],    ["red",8],["red",9],["red",10],
["black",1],["black",2],["black",3],["black",4],["black",5],["black",6],    ["black",7],["black",8],["black",9],["black",10]]

cardies = 30

while True:
  if cardies > 0:
    u1_card = random.choice(card_deck)
    u2_card = random.choice(card_deck)
    print ("player 1's card is", u1_card)
    print("player 2's card is", u2_card)
    card_deck.pop(u1_card)
    card_deck.pop(u2_card)
    len(card_deck) - 1
  if u1_card == u2_card:
    card_deck.pop

I expect the card deck ( card_deck ) to be shuffled randomly and then to be divided one card at a time to each player ( u1_card , u2_card ) until there are no cards left.

Answer 1

You want to call the function so brackets are necessary. It should be:

card = card_deck.pop() # for your last line of code

Also, pop() requires an index argument, so card_deck.pop(u1_card) will not work. You can get the index with .index() so

card_deck.pop(card_deck.index(u1_card))

Also I think you mean to be updating cardies with this line: len(card_deck) - 1

cardies -= 1 # you might have to change this to 2, to get the desired result because you are popping 2 cards per loop iteration

You should also have a condition to end the while loop otherwise you will encounter an error when the list is empty, something like:

while len(card_deck) != 0:
    ...