Question

def winheight(height):

    try:
        height = int(raw_input('Enter the height of the window in metres: '))
    except ValueError:
        print 'Please enter an integer'
        winheight(height)

    winlength(length)

def winlength(length):

    try:
        length = int(raw_input('Enter the length of the window in metres: '))
    except ValueError:
        print 'Please enter an integer'
        winlength(length)

    pricing(height, length)

def pricing(height, length):

    height_length = height * length

    price = int(height_length) * 100

    total = int(price) + 50

    print int(total)

winheight(height)

这是我正在尝试的代码，用于完成窗户更换业务的课程任务，每平方米的价格为100美元+初始价格为50美元

但是，每当我尝试运行此代码时，都会收到错误消息：

第31行，在 winheight（height）名称错误：未定义名称“ height”

我需要全局定义高度和长度，以便可以将其用作最终成本，我不确定如何解决此问题，我们将不胜感激

Answer 1

def addNew(): appendBase = open('dBase.cfg','a') uname = input('Username: ') pword = input('Password: ') appendBase.write(uname+','+pword+'\n') print('\nAdded new profile: \n'+uname+','+pword) appendBase.close()确实没有定义。您在函数中定义的height变量是 local 变量。函数调用结束后，它将停止存在。您可以返回它，也可以使用全局变量（但不要使用全局变量）

height

并通过def get_height(): while True: try: height = input() except ValueError: continue else: return height从主脚本中调用它（类似于height = get_height()，然后调用length)。

其他一些注意事项：

再次尝试pricing(height, length)，请使用while循环，而不要递归调用该函数（因为先前的函数堆栈处于打开状态）
没有任何必要传递input()变量并重新分配height。传递给height的值是副本，因此原件不会更改。

Answer 2

您的代码应如下所示：

def winheight(): #define window-height-getting function
    while True:
        try:
            height = int(raw_input("Enter the height of the window in metres: ")) #get user input for window height
            return height
        except ValueError: #catch improper inputs
            print "Please enter an integer"
def winlength(): #define window-length-getting function
    while True:
        try:
            length = int(raw_input("Enter the length of the window in metres: ")) #get user input for window length
            return length
        except ValueError: #catch improper inputs
            print "Please enter an integer"

def pricing(height, length): #define price-calculating function
    area = height * length #math to determine total price
    price = area * 100
    total = price + 50
    return total

user_height = winheight() #get window height from user
user_length = winlength() #get window length from user

total_price = pricing(user_height, user_length) #calculate total price by passing user window height and length to the pricing function

print "The total price is: $" + str(total_price) #print result

未定义功能

2 个答案: