class Restaurant():
def __init__(self,restaurant_name,cuisine_type):
“”“初学很容易出现 TypeError: __init__() takes exactly 3 arguments (4 given)的错误"""
"""究其原因，是要明白__init__()函数里只设置了两个形参“”“
”“”而你在接下来调用方法descript()时，直接设置了三个实参“”“
”“”你可以通过设置三个形参或者增加另外的方法，如下面的set_number_served（）“”“
”“”通过调用set方法设置属性值后再调用descript（）即可“”“
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type
self.number_served = 300
def describe_restaurant(self):
print(self.restaurant_name + " "
+ self.cuisine_type + " "
+ str(self.number_served) + ": ")
def open_restaurant(self):
print(" is openning!\n")
def set_number_served(self,number):
self.number_served = number
def adding(self,num):
“”“这里要注意先将adding_number置0，如果直接adding_number自加的话会得到你设置值的两倍"""
self.adding_number = 0
if self.adding_number >= 0:
self.adding_number = self.adding_number + num
print("We can serve: " + str(self.adding_number) + " person!")
else:
print("You can below adding_number!")
restaurant = Restaurant('Jerry&Eurus','sweetmeats')
restaurant.describe_restaurant()
restaurant.set_number_served(350)
restaurant.describe_restaurant()
restaurant.adding(50)