闪存卡扔硬币字典

Question

有点被这个密码困住了。我正试着从字典中随机地打印键或值。(是先显示条目还是显示相应的定义)，但我只得到一个键，后面跟着一个值。我错过了什么代码才能起作用？任何帮助都会是惊人的。谢谢你的例子：

• 测试-1(按返回键)定义-1
• 定义-4(按返回键)测试-4
• 定义-2(按返回键)测试-2
• 测试-3(按返回键)定义-3.

随机进口*

def flashcard():
    random_key = choice(list(dictionary))
    print('Define: ', random_key)
    input('Press return to see the definition')
    print(dictionary[random_key])

dictionary = {'Test-1':'Definition-1',
            'Test-2':'Definition-2',
            'Test-3':'Definition-3',
            'Test-4':'Definition-4'}

exit = False while not exit:
    user_input = input('Enter s to show a flashcard and q to quit: ')
    if user_input == 'q':
        exit = True
    elif user_input == 's':
        flashcard()
    else:
        print('You need to enter either q or s.')

Answer 1

您可以在0到1之间选择一个随机的int，也可以在0和1之间选择。

def flashcard():
    k, v = choice(list(dictionary.items()))
    # toss a coin to decide whether to show the key or the value
    # alternative is randint(0, 1)
    if choice((True, False)):
        print('Define: ', k)
        input('Press return to see the definition')
        print(v)
    else:
        print('What is: ', v)
        input('Press return to see the key')
        print(k)

Answer 2

使用random.random确定是否应首先显示random_key或定义

from random import *


def flashcard():
    random_key = choice(list(dictionary))
    if random() > 0.5:
        print("Define: ", random_key)
        input("Press return to see the definition")
        print(dictionary[random_key])
    else:
        print("Define: ", dictionary[random_key])
        input("Press return to see the key")
        print(random_key)


dictionary = {
    "Test-1": "Definition-1",
    "Test-2": "Definition-2",
    "Test-3": "Definition-3",
    "Test-4": "Definition-4",
}

exit = False
while not exit:
    user_input = input("Enter s to show a flashcard and q to quit: ")
    if user_input == "q":
        exit = True
    elif user_input == "s":
        flashcard()
    else:
        print("You need to enter either q or s.")

Answer 3

另一个选项是使用sample (学习更多)：

from random import choice,sample

def flashcard():
    print('Define: {}\nThe key: {}'.format(*sample(choice([*dictionary.items()]),2)))

dictionary = {'Test-1':'Definition-1',
            'Test-2':'Definition-2',
            'Test-3':'Definition-3',
            'Test-4':'Definition-4'}

# testing
for _ in range(3):
    flashcard()
    print()

>>> out
'''
Define: Test-4
The key: Definition-4

Define: Definition-1
The key: Test-1

Define: Definition-2
The key: Test-2