Python：如何从 elif 调用的函数返回两个值？

Question

这里的elif someother_function():检查是否为真，还需要打印返回值。 谁能帮我解决这个问题？

def some_function():
     if correct:
         return True
     else:
         return False

def someother_function():
     if correct:
         return True,f
     else:
         return False,None


if some_function():
     print("something")
elif someother_function():
     print(f)
else:
     print("nothing")

这里，如何将 f 从 someother_function 返回到它在 elif 调用的地方？

Answer 1

你可以试试：

def some_function(correct):
   if correct:
       return False
   else:
       return False

def someother_function():
    if correct:
       return True, f
else:
    return False, None

if some_function():
    print("something")
elif [x := someother_function()] and x[0]:
    print(x[1])
else:
    print("nothing")

Answer 2

也许不是你想要的，但你可以把你的函数变成生成器。

def some_function():
    return correct

def someother_function():
     if correct:
         yield True
         yield "A"
     else:
         yield False
         yield None
someother_function_gen = someother_function()


if some_function():
     print("something")
elif next(someother_function_gen):
     print(next(someother_function_gen))
else:
     print("nothing")

Answer 3

我认为您需要指定一种事件。如果需要，请检查此代码并尝试：

import random

event = random.choice([True, False])

def some_function(correct):
     if correct:
         return True
     else:
         return False

def someother_function(correct):
     if correct:
         return True, f
     else:
         return False, None


if event == True:
    some_function()
    print("something")
elif event == False:
    someother_function():
    print(f)
else:
    print("nothing")

Answer 4

如果你愿意，你可以用你的函数编写一个类，并用你的输出设置一个类变量：

import random

class foo:
    
    def __init__(self):
        self.f=None
        
    def some_function(self):
        correct= random.choice([True, False])
        if correct:
            return True
        else:
            return False

    def someother_function(self):
        self.f = "something 2"
        correct= random.choice([True, False])
        if correct:
            return True,
        else:
            return False,None

if __name__=="__main__":
    temp = foo()
    if temp.some_function():
         print("something")
    elif temp.someother_function():
         print(temp.f)
    else:
         print("nothing")