Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.


Code not running: "TypeError: 'list' object is not callable"

Hi my code is not working i have checked the related questions but did not come up with a solution.


  .fun {
    background-color: yellow;
    color: pink;
    font-size: 5000px;
from cards import Card
import random

class Game:
    def __init__(self):
        self.size = 4
        self.card_options = ['Add', 'Boo', 'Egg', 'Hut', 'Tab', 'Nut', 'Woo', 'Top']
        self.columns = ['A', 'B', 'C', 'D']
        self.cards = []
        self.locations = []
        for column in self.columns:
            for num in range(1, self.size + 1):

    def set_cards(self):
        used_locations = []
        for name in self.card_options:
            for i in range(2):
                available_locations = set(self.locations) - set(used_locations)
                random_location = random.choice(list(available_locations))
                card = Card(name, random_location)

    #create cards
    #create grid
    #check for matches
    #check game won
    #run the game

#dunder main
if __name__ == '__main__':
    game = Game()
    for card in game.cards():

    #create game instance
    #call start game 


  .fun {
    background-color: yellow;
    color: pink;
    font-size: 5000px;

class Card():
    def __init__(self, name, location):
        self.name = name
        self.location = location
        self.matched = False

    def __eq__(self, other):
        return self.name == other.name

    def __str__(self):
        return f'Your cards is {self.name}'

if __name__ == '__main__':
    card1 = Card('egg', 'A1')
    card2 = Card('hut', 'B4')
    card3 = Card('egg', 'C3')

    print(card1 == card2)
    print(card1 == card3)
    print(card3 == card2)

The error code I receive is: Traceback (most recent call last):
File "/home/treehouse/workspace/game.py", line 38, in <module>
for item in game.cards():
TypeError: 'list' object is not callable

Thank you in advance

2 Answers

Chris Freeman
Chris Freeman
Treehouse Moderator 68,029 Points

Hey Frederic Stein, in the dunder main code for loop, you loop over game.cards()

    for card in game.cards():

game is an instance of Game. The cards attribute is defined by the __init__ code self.cards = [], then this list is further defined in set_cards method using the line self.cards.append(card).

By placing a () at the end of game.cards() you are calling the function game.cards. Remove the parens so that you are looping over the list game.cards instead of trying to loop over the results of the call to the non-existent game.cards() function.

Post back if you need more help. Good luck!!

Thank you very much for your help!