Python NameError:未定义全局名称

我的python代码不断得到nameerror，ticketSold上未定义全局变量。我不知道如何解决这个问题，因为我将它定义为一个全局变量。感谢您的帮助

aLimit=300
bLimit=500
cLimit=100
aPrice=20
bPrice=15
cPrice=10

def Main():
global ticketSold

getTickets(aLimit)
sectionIncome=calcIncome(ticketSold,aPrice)
SectionIncome+=totalIncome
print("The theater generated this much money from section A "+str(sectionIncome))

getTickets(bLimit)
sectionIncome=calcIncome(ticketSold,bPrice)
SectionIncome+=totalIncome
print("The theater generated this much money from section B "+str(sectionIncome))

getTickets(cLimit)
sectionIncome=calcIncome(ticketSold,cPrice)
sectionIncome+=totalIncome
print("The theater generated this much money from section C "+str(sectionIncome))
print("The Theater generated "+str(totalIncome)+" total in ticket sales.")

    def getTickets(limit):
ticketSold=int(input("How many tickets were sold? "))
if (ticketsValid(ticketSold,limit)==True):
    return ticketSold
else:
    getTickets(limit)

   def ticketsValid(ticketSold,limit):

while (ticketSold>limit or ticketSold<0):
    print ("ERROR: There must be tickets less than "+str(limit)+" and more than 0")
    return False
return True

aLimit=300
bLimit=500
cLimit=100
aPrice=20
b价格=15
cPrice=10
def Main（）：
全球售票网
getTickets（aLimit）
部分收入=收入（票证，4月）
部分收入+=总收入
print（“剧院从A区+str（sectionIncome）中产生了这么多钱”）
getTickets（bLimit）
部分收入=收入（票证金额，B价格）
部分收入+=总收入
印刷品（“剧院从B区+str（sectionIncome）产生了这么多钱”）
getTickets（cLimit）
部分收入=收入（票证持有人、cPrice）
部分收入+=总收入
印刷（“剧院从C区+str（sectionIncome）产生了这么多钱”）
打印（“剧院生成”+str（总收入）+“门票销售总额”）
def getTickets（限制）：
ticketSold=int（输入（“售出多少张票？”）
如果（ticketsValid（ticketSold，limit）=True）：
退票票
其他：
getTickets（限制）
def TICKTSVALID（TICKTSOLD，限制）：
虽然（ticketSold>limit或ticketSold说
global varname
不会神奇地为您创建
varname
。您必须在全局名称空间中声明
ticketSold
，例如在
cPrice=10
之后
global
只确保当您说
ticketSold
时，您使用的是全局变量n。）amed
ticketSold
而不是同名的局部变量。
以下是一个版本：


Python 2/3兼容吗
不使用任何全局变量
很容易扩展到任意数量的节
演示了OOP的一些好处（相对于命名变量的激增：
aLimit
，
bLimit
，等等-当您到达27个部分时，您将做什么？）

因此：

import sys

if sys.hexversion < 0x3000000:
    # Python 2.x
    inp = raw_input
else:
    # Python 3.x
    inp = input

def get_int(prompt):
    while True:
        try:
            return int(inp(prompt))
        except ValueError:  # could not convert to int
            pass

class Section:
    def __init__(self, name, seats, price, sold):
        self.name  = name
        self.seats = seats
        self.price = price
        self.sold  = sold

    def empty_seats(self):
        return self.seats - self.sold

    def gross_income(self):
        return self.sold * self.price

    def sell(self, seats):
        if 0 <= seats <= self.empty_seats():
            self.sold += seats
        else:
            raise ValueError("Cannot sell {} seats, only {} are available".format(seats, self.empty_seats))

def main():
    # create the available sections
    sections = [
        Section("Loge",  300, 20., 0),
        Section("Floor", 500, 15., 0),
        Section("Wings", 100, 10., 0)
    ]

    # get section seat sales
    for section in sections:
        prompt = "\nHow many seats were sold in the {} Section? ".format(section.name)
        while True:
            # prompt repeatedly until a valid number of seats is sold
            try:
                section.sell(get_int(prompt))
                break
            except ValueError as v:
                print(v)
        # report section earnings
        print("The theatre earned ${:0.2f} from the {} Section".format(section.gross_income(), section.name))

    # report total earnings
    total_earnings = sum(section.gross_income() for section in sections)
    print("\nTotal income was ${:0.2f} on ticket sales.".format(total_earnings))

if __name__=="__main__":
    main()

请修正缩进。请修正缩进。在python中，缩进不是eyecandy，而是语法的一部分。请修正缩进。我没有看到函数
calincome
。似乎以前没有人说过。所以请修正缩进。
How many seats were sold in the Loge Section? 300
The theatre earned $6000.00 from the Loge Section

How many seats were sold in the Floor Section? 300
The theatre earned $4500.00 from the Floor Section

How many seats were sold in the Wings Section? 100
The theatre earned $1000.00 from the Wings Section

Total income was $11500.00 on ticket sales.