通过另一个函数访问一个函数的返回值 [英] Accessing returned values from a function, by another function

问题描述

我一般对编程还是有点陌生​​，刚开始真正接触python。
而且我正在做一个数字猜测器项目。

I'm kinda new to programming in general, just started to really get into python. And I'm working on a number guesser project.

import random

def main(): # main function
    print("Welcome to the number guesser game")
    range_func()
    max_guess_number(lower_range_cut, upper_range_cut)
    evaluation(random_number, total_guesses)

def range_func():   # allows user to select a range for the number guess
    print("Please select a range in which you would like to guess.")
    lower_range_cut = int(input("Lower boundary limit: "))
    global lower_range_cut
    upper_range_cut = int(input("Upper boundary limit: "))
    global upper_range_cut
    random_number = random.randint(lower_range_cut,upper_range_cut)
    global random_number
    return lower_range_cut, upper_range_cut, random_number

def max_guess_number(low,high): # returns the total number of guesses
    total_numbers = (high - low) + 1
    total_guesses = 0
    while (2**total_guesses) < total_numbers:
        total_guesses += 1
    print ("You have a total of %d guesses\n"
           "for your range between %d to %d"
           % (total_guesses, low, high))
    global total_guesses
    return total_guesses

def evaluation(random_number, total_guesses): # evaluates the users input
    guess_count = 0
    while guess_count < total_guesses:
        user_guess = int(input("Your guess: "))
        print("Your guess is: %d" % (user_guess))
        if (random_number == user_guess):
            print("You got it ")
            break
        elif user_guess > random_number:
            print("Guess lower!")
            guess_count += 1
        else:
            print("Guess higher!")
            guess_count += 1

if __name__ == "__main__":
    main()

我在编写该程序时遇到的一个问题是，如果不将每个变量重新定义为全局变量，就无法执行该程序。仅仅从一个函数返回值，我无法访问例如第二个从range_function返回的变量upper_range_cut

One problem I've experienced while writing that, is that I wasn't able to execute this program without redefining each variables as a global variable. Just by returning the values from one function, I was not able to access e.g. the second returned variable upper_range_cut from the range_function

有什么方法可以解决这个问题吗？

It there a way to handle that somehow shorter?

对于代码本身的每个注释（可读性，功能使用，长度）感到很高兴。我知道也许可以通过使用列表理解来使这段代码缩短很多，但是我真的还没有看到这一领域的机会。

Also I'm happy about every note on the code itself (readability, function use, length). I know it could have made this code a lot shorter maybe by using list comprehension, but I don't really have the eye for seeing opportunities in this area yet.

所以谢谢你的帮助！

KiliBio

推荐答案

你很漂亮很多。您可以删除所有全局变量，然后将每个函数返回的值存储到局部变量中，然后将它们传递给新函数。

You're pretty much there. You can remove all globals, then just store the values returned from each function to local variables, and pass them in to new functions.

我所做的唯一其他更改以下是：

The only other changes I've made below are:

• 如果正确猜出答案，将超出评估循环。


• 打印如果在给定时间内未找到任何猜测，则会显示一条消息。请参阅： Python while语句上的其他子句


• 最下面的两行允许从命令行运行脚本。请参阅：如果__name__ == __main__怎么办？

• Breaking out of the evaluation loop if the answer is guessed correctly.
• Printing a message if no guess is found in the given time. See: Else clause on Python while statement
• The bottom two lines allow the script to be run from the command line. See: What does if __name__ == "__main__": do?

否则，您看起来不错。

import random

def main(): # main function
    print("Welcome to the number guesser game")
    lower, upper, rand = range_func()
    total_guesses = max_guess_number(lower, upper)
    evaluation(rand, total_guesses)

def range_func():   # allows user to select a range for the number guess
    print("Please select a range in which you would like to guess.")
    lower_range_cut = int(input("Lower boundary limit: "))
    upper_range_cut = int(input("Upper boundary limit: "))
    random_number = random.randint(lower_range_cut, upper_range_cut)
    return lower_range_cut, upper_range_cut, random_number

def max_guess_number(low,high): # returns the total number of guesses
    total_numbers = (high - low) + 1
    total_guesses = 0
    while (2**total_guesses) < total_numbers:
        total_guesses += 1
    print ("You have a total of %d guesses\n"
           "for your range between %d to %d"
           % (total_guesses, low, high))

    return total_guesses

def evaluation(random_number, total_guesses): # evaluates the users input
    guess_count = 0
    while guess_count < total_guesses:
        guess_count += 1
        user_guess = int(input("Your guess: "))
        print("Your guess is: %d" % (user_guess))
        if (random_number == user_guess):
            print("You got it!")
            break
    else:
        print "Sorry, you didn't guess it in time. The answer was: %d" % random_number

if __name__ == '__main__':
    main()

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