如何将函数的结果用作数据到另一个？

Question

我创造了一种方法来获得板球比赛的折腾。我需要从toss()使用该结果在另一个温控功能的结果（）

import random 
tos = input("Choose head or tail \n") 
def toss(): 
    if tos == "head": 
      result = ["Bat", "Bowl"] 
      r =print(random.choice(result)) 
    elif tos == "tail": 
      result = ["Bat", "Bowl"] 
      r =print(random.choice(result)) 
    else: 
      print("ERROR!") 
toss() 
def result(): 
    # i need the value in toss either bat or bowl to be used in if 
    if r =="Bat": 
     runs = ["1" , "2","3","4","5","6","7","8","9","0","W",] 
     runs_2=print(random.choice(runs)) 

result() 

Answer 1

首先，你必须return结果从抛起然后分配到你作为参数传递给一个变量在if语句conditon使用result

import random 
tos = input("Choose head or tail \n") 
def toss(): 
    if tos == "head": 
     result = ["Bat", "Bowl"] 
     r =print(random.choice(result)) 
    return r 
elif tos == "tail": 
     result = ["Bat", "Bowl"] 
     r =print(random.choice(result)) 
    return r 
else: 
     print("ERROR!") 

myToss = toss()#instantiation of return from function 

def result(r) 
    if r =="Bat": 
     runs = ["1" , "2","3","4","5","6","7","8","9","0","W",] 
     runs_2=print(random.choice(runs)) 

result(myToss) #added parameter 

Answer 2

因此，首先，你的函数应该采取一个参数tos。使用全局变量可能会导致麻烦，应尽可能避免。

另外，您正在设置toss()函数中的r变量。这意味着r只存在于toss()的范围内，并且在其外部不可用。

其次，即使r是一个全局变量集toss()，因为print不返回任何东西，r永远是None。您必须删除print。三，不要使用全局变量来获取函数的输出（除非你真的需要）。相反，你应该return的东西。

def toss(tos): 
    result = ["Bat", "Bowl"] 
    if tos == "head": 
     r = random.choice(result) 
    elif tos == "tail": 
     r = random.choice(result) 
    else: 
     raise ValueError("You must choose 'head' or 'tail'") 
    print(r) 
    return r 

def result(this_is_NOT_r): 
    if this_is_NOT_r =="Bat": 
     runs = ["1" , "2","3","4","5","6","7","8","9","0","W",] 
     return random.choice(runs) 

print(result(toss(input("Choose head or tail \n"))))