Question

我正在尝试实例化一个类：

class Customer(object):
    def __init__(self, name, money, ownership):
        self.name = name
        self.money = money
        self.ownership = ownership

    def can_afford(self):
        x = False
        for bike in bikes.values():

            if self.money >= bike.money * margin:
                print "Customer {} can afford {}".format(self.name, bike)
                x = True
        if not x:
            print "Customer {} cannot afford any bikes at this time.".format(self.name)

shoppers = {        
    # Initial condition of shopper1
    "Jane": Customer("Jane", 200, False),
    # Initial condition of shopper2
    "Alfred": Customer("Alfred", 500, False),
    # Initial condition of shopper3
    "Taylor": Customer("Taylor", 1000, False)
}

buyer = Customer(name, money, ownership)

但buyer = Customer(name, money, ownership)一直受到误导：

Undefined variable 'name'
Undefined variable 'money'
Undefined variable 'ownership'

但我想我用“Customer（...）”

在我的字典中设置了变量的值

Answer 1

class Customer(object):
    def __init__(self, name, money, ownership):
        self.name = name
        self.money = money
        self.ownership = ownership

    def can_afford(self):
        x = False
        for bike in bikes.values():

            if self.money >= bike.money * margin:
                print "Customer {} can afford {}".format(self.name, bike)
                x = True
        if not x:
            print "Customer {} cannot afford any bikes at this time.".format(self.name)

shoppers = {        
    # Initial condition of shopper1
    "Jane": Customer("Jane", 200, False),
    # Initial condition of shopper2
    "Alfred": Customer("Alfred", 500, False),
    # Initial condition of shopper3
    "Taylor": Customer("Taylor", 1000, False)
}
#this is solution for your MENTIONED problem only
name = 'Buddy' 
money = 2
ownership = 'something'
buyer = Customer(name, money, ownership)

上面提到的问题的解决方案，你只需要定义一些值。但是还有其他一些问题，比如bikes.values（），从哪里来的？

记住，要使用某些东西，你必须首先告诉它是什么，所以定义一些东西。

希望它有所帮助。

在Python中实例化类时出错

1 个答案: