Question

我是Eric Matthes撰写的Crash Course Python的完整入门者。这是我的代码，试图访问词典密钥，并将字典存储在列表shirts中。

red_shirt = {'shirt_color': 'red', 'shirt_price': 20}
blue_shirt = {'shirt_color': 'blue', 'shirt_price': 25}
green_shirt = {'shirt_color': 'green', 'shirt_price': 30}

shirts = [red_shirt, blue_shirt, green_shirt]

user_input = input('Which shirt would you like to purchase?\n:')
for shirt in shirts:

到目前为止，我认为我在for循环中遇到问题...我应该使用第二个for循环来访问字典中的键吗？

    if shirt['shirt_color'] == 'red':
        #shirt_color = 'red'
        print('You bought the ' + shirt['shirt_color'] + ' shirt for $' + str(shirt['shirt_price']))

由于使用k['v']访问字典的值，我也尝试使用.format。

    elif shirt['shirt_color'] == 'blue':
        #shirt_color = 'blue'
        print('You bought the ' + shirt['shirt_color'] + ' shirt for $' + str(shirt['shirt_price']))
    elif shirt['shirt_color'] == 'green':
        #shirt_color = 'green'
        print('You bought the ' + shirt['shirt_color'] + ' shirt for $' + str(shirt['shirt_price']))
    else:
        print('It seems we do not have the shirt you are looking for, please try again')

Answer 1

我认为您几乎可以得到想要的东西，只是忘了需要实际引用您请求的用户输入。

red_shirt = {'shirt_color': 'red', 'shirt_price': 20}
blue_shirt = {'shirt_color': 'blue', 'shirt_price': 25}
green_shirt = {'shirt_color': 'green', 'shirt_price': 30}

shirts = [red_shirt, blue_shirt, green_shirt]

user_input = input('Which shirt would you like to purchase?\n:')
for shirt in shirts:
    if shirt['shirt_color'] == user_input:
        print('You bought the ' + shirt['shirt_color'] + ' shirt for $' + str(shirt['shirt_price']))

如何从存储在列表中的字典中正确访问字典键？

1 个答案: