python编程---example19

user.py 

class User():
	def __init__(self,first_name,last_name,username,email,location):
		self.first_name = first_name.title()
		self.last_name = last_name.title()
		self.username = username
		self.email = email
		self.location = location.title()
		self.login_attempts = 0

	def describe_user(self):
		print("\n" + self.first_name + " " + self.last_name)
		print(" Username: " + self.username)
		print(" Email: " + self.email)
		print(" Location: " + self.location)

	def greet_user(self):
		print("\nWelcome back, " + self.username + "!")

	def increment_login_attempts(self):
		self.login_attempts += 1

	def reset_login_attempts(self):
		self.login_attempts = 0

admin.py

from user import User

class Admin(User):
	def __init__(self,first_name,last_name,username,email,location):
		super().__init__(first_name,last_name,username,email,location)
		# Initialize an empty set of privileges.
		self.privileges = Privileges([])

class Privileges():
	def __init__(self,privileges):
		# Initialize the privileges object.
		self.privileges = privileges

	def show_privileges(self):
		for privileges in self.privileges:
			print("- " + privileges)

my_admin.py

from admin import Admin

eric = Admin('eric','matthes','e_matthes','e_matthes@example.com','alaska')
eric.describe_user()

eric_privileges = [
	'can reset passwords',
	'can moderate discussions',
	'can suspend accounts',
]
eric.privileges.privileges = eric_privileges

print("\nThe admin " + eric.username + " has these privileges: ")
eric.privileges.show_privileges()