Here is some code I wrote:
class Food:
def __init__(self, name):
Food.foodName = name
class Customer:
def __init__(self,name):
Customer.name = name
Customer.food = 0
def placeOrder(self, foodName, employee):
print "Hi %s!" % employee.name
print "I want %s please! " % foodName
self.food = employee.takeOrder(foodName)
def printFood(self):
print self.food.foodName
class Employee:
def __init__(self, name):
Employee.name = name
def takeOrder(self, foodName):
print "%s coming up!" % foodName
food = Food(foodName)
return food
class Lunch:
def __init__(self):
self.employee = Employee('Dave')
self.customer = Customer('Chris')
def order(self, foodName):
self.customer.placeOrder(foodName, self.employee)
def result(self):
print self.customer.name, "has",
self.customer.printFood()
if __name__ == '__main__':
meal = Lunch()
meal.order('spam')
meal.result()
Basically, a Lunch creates a Customer and an Employee.
When Lunch's order method is called, the Customer
places an order with placeOrder, which activates
takeOrder from the Employee. takeOrder creates a Food
object using the foodName string that has been passed
down from Lunch's order method. The Food object is
then passed to Customer. I then run Lunch's result
method to see if Customer received the Food object.
[EMAIL PROTECTED]:/imports/home/cspears/Documents/Python/chap23/ex07>
python lunch.py
Hi Dave!
I want spam please!
spam coming up!
Chris has spam
None
This is almost correct. Why does None appear? This
is the only fly in the ointment. I'm probably missing
something subtle.
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