返回外部函数错误让我感到困惑

Question

我是 python 新手，我对这个我不知道如何解决的问题感到非常生气，而且在互联网上似乎没有任何帮助。 如果您知道问题是什么，请提供帮助。

guesses = 0
usernum = int(input("pick a number betwen 1 and 10"))
if usernum > 10 or usernum < 1:
    print("That number is bigger than 10 or smaller than 1. Try again")
    usernum = int(input("pick a number betwen 1 and 10"))
    if usernum > 10 or usernum < 1:
        print("You failed... again. wow thats sad just restart the program")

print("okay now i will find what your number is...")

while not compnum == usernum:
    import random
    compnum = random.int(1, 10)
    guesses = gueses +1
    if not compnum == usernum:
        return

错误是

文件“”，第 16 行返回 ^^^^^^ SyntaxError: 'return' outside function

Answer 1

return必须在函数中使用。 像这样：

def fun():
    statements
    .
    .
    return [expression]

在第 14 行你写了guesses = gueses +1 ， gueses没有定义

您的代码应如下所示：

import random # import a the top 

compnum = random.randint(1, 10) # generate number once

guesses = 0
usernum = int(input("pick a number betwen 1 and 10: "))
if usernum > 10 or usernum < 1:
    print("That number is bigger than 10 or smaller than 1. Try again: ")
    usernum = int(input("pick a number betwen 1 and 10: "))
    if usernum > 10 or usernum < 1:
        print("You failed... again. wow thats sad just restart the program: ")

print("okay now i will find what your number is...: ")

while not compnum == usernum:
    usernum = int(input("pick a number betwen 1 and 10: "))
    guesses = guesses +1
    if not compnum == usernum:
        continue

Answer 2

您不能在函数之外使用 return。 如果要停止循环，则需要使用break或将整个函数设为函数。 但实际上没有必要使用那个 if 语句，while 循环无论如何都会停止。 以下版本的代码可以满足您的需求。

import random

def guess(number):
    guesses = 1
    compnum = random.randint(1, 10)
    while not compnum == usernum:
        compnum = random.randint(1, 10)
        guesses = guesses + 1
    return f"number: {compnum}", f"guesses: {guesses}"

usernum = int(input("pick a number betwen 1 and 10"))
if usernum > 10 or usernum < 1:
     print("That number is bigger than 10 or smaller than 1. Try again")
     usernum = int(input("pick a number betwen 1 and 10"))
     if usernum > 10 or usernum < 1:
         print("You failed... again. wow thats sad just restart the program")

print("okay now i will find what your number is...")
print(guess(usernum))