我正在尝试创建一些逻辑，可以可靠地在两件事之间进行选择。但是下面的代码似乎有一些严重的错误，因为通常没有选择。

import random
while True:
    if random.choice([0, 1]) == 0:
        print("Right")
    elif random.choice([0, 1]) == 1:
        print("Left")
    else:
        print("Why do we ever reach the else?")

输出如下所示：

$ python3 random.choice.broken.py 
Why do we ever reach the else?
Why do we ever reach the else?
Left
Why do we ever reach the else?
Left
Right
Left
Left
Why do we ever reach the else?
Why do we ever reach the else?
Right
Why do we ever reach the else?
Left
Right
Right
Why do we ever reach the else?
Left
Right
Left
Left
Right
Left
Right
Right
Right
Why do we ever reach the else?
Left
Why do we ever reach the else?
Why do we ever reach the else?
Right

我相信一定有一个合理的解释。但是我无法在网上或文档中找到它。谢谢。

回答

import random
while True:
    ch = random.choice([0, 1])   #<-----
    if  ch == 0:
        print("Right")
    elif ch == 1:
        print("Left")
    else:
        print("Why do we ever reach the else?")

Left
Right
Right
Right
Right
Left
Right
Left
Right
Left
Right
Left
Left
Left
Right
Left
Right
Left
Left
Left
Left