无法突破python中的while循环 [英] Cannot break out of while loop in python

问题描述

无法在python中退出while循环：
我尝试将代码全部合并在一起，没有main和getheight函数，但这仍然给我一个无限循环。

Cannot break out of while loop in python: I tried merging the code all together with no main and getheight functions, and it still gives me an infinite loop.

def main():
    x = 0
    while x not in range (1,23):
        getheight()
        if x in range (1,23):
            break
    for i in range (x):
        for j in range (x - j):
            print (" ", end="")
        for j in range (x):
            print ("#", end="")
        print ("  ", end="")
        for j in range (x):
            print ("#", end="")
        "\n"

def getheight():
    x = input("Give me a positive integer no more than 23 \n")
    return x

if __name__ == "__main__":
    main()

推荐答案

x main（）是一个局部变量，与<$中的 x 变量无关 c $ c> gethe ight（）。您正在从后者返回新值，但是忽略了返回值。在函数调用结果的 main 中设置 x ：

x in main() is a local variable that is independent from the x variable in getheight(). You are returning the new value from the latter but areignoring the returned value. Set x in main from the function call result:

while x not in range (1,23):
    x = getheight()
    if x in range (1,23):
        break

您还需要修复 getheight（）函数返回整数，而不是字符串：

You also need to fix your getheight() function to return an integer, not a string:

def getheight():
    x = input("Give me a positive integer no more than 23 \n")
    return int(x)

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