Question

每次我想要更改字符串时，如何从字符串中随机选择字符，例如：

import random

def user_input():
    chars = 'abcdefghijklmnopqrstuvwxyz'
    present = random.choice(chars)
    while True:
        print present
        to_eval = raw_input('Enter key: ')
        if to_eval == present:
            print 'Correct!'
            break
        else:
            # change the key and ask again

user_input()

Answer 1

import random

def user_input():
    chars = 'abcdefghijklmnopqrstuvwxyz'
    present = random.choice(chars)
    while True:
        print present
        to_eval = raw_input('Enter key: ')
        if to_eval == present:
            print 'Correct!'
            present = random.choice(chars)

user_input()

这将继续询问，直到正确为止。然后选择一个新值并继续循环。要结束，您必须输入ctl-c

Answer 2

它认为这就是你想要的：

import random

def user_input():
    while True:
        chars = 'abcdefghijklmnopqrstuvwxyz'
        present = random.choice(chars)
        print present
        to_eval = raw_input('Enter key: ')
        if to_eval == present:
            print 'Correct!'
            break

user_input()

Answer 3

您可以使用yield来尝试简化代码：

import random

def guesses():
    chars = 'abcd..'
    while True:
        yield random.choice(chars) == raw_input('Enter Key: ').strip()

def play():
    for guess in guesses():
        if guess:
            print 'Correct!'
            break

如何在每次需要时随机选择一个角色

3 个答案: