Question

我对此代码存在一些问题。还有很多其他代码可以使用它，但没有一个会干扰或影响我遇到的问题。所以基本上，当我运行代码并且我们到达底部的for循环时，它没有打印任何内容，因为显然是变量＆＃39; wall＆＃39; = 0，即使我已经给它一个有效的输入。如果有人能提供帮助，我将不胜感激。

global walls
global wallLengths
walls = 0
wall = 0
wallLengths = 0

def clientDetails():
    #global walls

    print("Welcome to the InHouse Solutions Room Painting Price Calculator")

    print("STEP 1 - CLIENT DETAILS")
    print("Please enter your full name")
    userName = input(">>>")

    print("Please enter your post code")
    postCode = input(">>>")

    print("Please enter you first address line here:")
    addressLineOne = input(">>>")

    print("Please enter your second address line here (OPTIONAL)")
    addressLineTwo = input(">>>")


    print("Thank you for your information")
    print (userName)
    print (addressLineOne + ", " + addressLineTwo + ", " + postCode)
    print (" ")

    def ValidationOne():
        print ("Is this information correct? Pleast enter Yes or No")
        clientDetailsCorrect = input(">>>")

        if clientDetailsCorrect == "no" or clientDetailsCorrect == "No":
            clientDetails()
        elif clientDetailsCorrect == "Yes" or clientDetailsCorrect == "yes":
            roomDimensions()
        else:
            ("Invalid response, please try again")
            ValidationOne()

    ValidationOne()      

def roomDimensions():
    global walls 
    print ("STEP 2 - ROOM DIMENSIONS")

    def ValidationTwo():
        global walls
        print ("How many walls does your room have?")
        walls = int(input(">>>"))
        if walls > 10 or walls < 3:
            print("Invalid, please enter a number between 3 and 10")
            ValidationTwo()
        elif walls == " " or walls == "":
            print("Invalid")
            ValidationTwo()

    def ValidationThree():
        global walls
        print ("How tall is the room in meters?")
        roomHeight = float(input(">>>"))
        if roomHeight < 2.4 or roomHeight > 6:
            print ("Invalid, please enter a value between 2.4 and 6")
            ValidationThree()

    def IndividualWalls():
        global wallLengths
        global walls
        for i in range(1,walls):
            print("Please enter the width of wall" , i)
            wallLengths[i] = float(input(">>>"))

    ValidationTwo()
    ValidationThree()
    IndividualWalls()
clientDetails()

Answer 1

没有必要使用＆＃39; global＆＃39;在脚本顶部声明全局时的关键字：

>>> walls = 0
>>> def increase_walls():
...   global walls
...   walls += 1
...   print walls
... 
>>> increase_walls()
1

Answer 2

我不能对你的问题发表评论，因为我的声誉不超过50，所以我会问这里你能告诉我roomDimensions的功能吗？我试图运行它，你有一些深度递归问题（你不能调用递归函数，没有任何if - 它将永远运行）但我注意到的第一件事是你没有初始化wall变量所以它不会是全局变量，它将是非局部变量。而且你没有调用任何内部函数（ValidationTwo，ValidationThree，IndividualWalls）

所以你的主要问题是:(按此顺序处理它们）

墙初始化
你没有调用任何内部函数
深度递归

这是我使用上述三个的例子：

global_var = 12

def outer():
    global global_var
    print("*"*10)
    print('hello im outer function')
    print("*"*10)
    def inner1():
        global global_var
        print('hello im inner1 function')
        if global_var < 10:
            return 'end for inner1' 
        print ('global_var is: ' + str(global_var))
        global_var -= 1
        return inner1()

    def inner2():
        global global_var
        print('hello im inner2 function')
        if global_var >= 10:
            return 'end for inner1' 
        print ('global_var is: ' + str(global_var))
        global_var += 1
        return inner2()

    if global_var >= 10:
        return inner1()
    else:
        return inner2()

if __name__ == '__main__':
    print outer()

全局变量及其值的问题

2 个答案: