高级编程技术，第五周

9.1

class Restaurant:
	
		def __init__(self,restaurant_name,cuisine_type):
				self.restaurant_name = restaurant_name
				self.cuisine_type = cuisine_type
		
		def describe_restaurant(self):
			print("It's a " + self.cuisine_type + " restaurant,and it's name is " + self.restaurant_name)
			
		def open_restaurant(self):
			print("The restaurant is open.")
			

a = Restaurant('LongRiver',"China",)
b = Restaurant("GaliGali","India",)
print(a.restaurant_name)
print(a.cuisine_type)
print(b.restaurant_name)
print(b.cuisine_type)
a.describe_restaurant()
a.open_restaurant()
b.describe_restaurant()
b.open_restaurant()

9.2

class Restaurant:
	
		def __init__(self,restaurant_name,cuisine_type):
				self.restaurant_name = restaurant_name
				self.cuisine_type = cuisine_type
		
		def describe_restaurant(self):
			print("It's a " + self.cuisine_type + " restaurant,and it's name is " + self.restaurant_name)
			
		def open_restaurant(self):
			print("The restaurant is open.")
			

a = Restaurant('LongRiver',"China")
b = Restaurant('GaliGali',"India")
c = Restaurant('Lamenta',"France")

a.describe_restaurant()
b.describe_restaurant()
c.describe_restaurant()

9.4

class Restaurant:
	
		def __init__(self,restaurant_name,cuisine_type):
				self.restaurant_name = restaurant_name
				self.cuisine_type = cuisine_type
				self.number_served = 0
		
		def describe_restaurant(self):
			print("It's a " + self.cuisine_type + " restaurant,and it's name is " + self.restaurant_name)
			
		def open_restaurant(self):
			print("The restaurant is open.")
			
		def set_number_served(self,num):
			self.number_served = num
			
		def increment_number_served(self,num):
			self.number_served += num
			
a = Restaurant('LongRiver',"China")
print(a.number_served)
a.number_served = 100
print(a.number_served)
a.set_number_served(200)
print(a.number_served)
a.increment_number_served(100)
print(a.number_served)

9.6

class Restaurant:
	
		def __init__(self,restaurant_name,cuisine_type):
				self.restaurant_name = restaurant_name
				self.cuisine_type = cuisine_type
		
		def describe_restaurant(self):
			print("It's a " + self.cuisine_type + " restaurant,and it's name is " + self.restaurant_name)
			
		def open_restaurant(self):
			print("The restaurant is open.")
			


class IceCreamStand(Restaurant):
		
		def __init__(self,restaurant_name,cuisine_type,flavors):
			super().__init__(restaurant_name,cuisine_type)
			self.flavors = flavors
			
		def show_flavors(self):
			print(self.flavors)
			


a = IceCreamStand("shalala","Ice",['Sundae','Popsicle','Mango','Cherry'])
a.show_flavors()

============================================================================

10.1

with open('test.txt') as file_object:
	contents = file_object.read()
	print(contents)
	
with open('test.txt') as file_object:
	for line in file_object:
		print(line.rstrip())
	
with open('test.txt') as file_object:	
	lines = file_object.readlines()
for line in lines:
	print(line.rstrip())

10.2

with open('test.txt') as file_object:	
	lines = file_object.readlines()

for line in lines:
	oline = line.replace('Python','C')
	print(oline.rstrip())

10.3

name = input('please enter your name:')

with open('guest.txt','a') as file_object:
	file_object.write(name + '\n')

10.4

name = input('please enter your name:')
while name != ' ':
	print(name + ",WELCOME!")
	with open('guest_book.txt','a') as file_object:
		file_object.write(name + '\n')
	name = input('please enter your name:')

10.5

reason = input('why you like programming?:')
while reason != ' ':
	with open('reason.txt','a') as file_object:
		file_object.write(reason + '\n')
	reason = input('why you like programming?:')

10.6

print("input two num:")
a = input("first:")
b = input("second:")
try:
	ans = int(b) + int(a)
except ValueError:
	print("please enter number!")
else:
	print(ans)

10.7

while True:
	print("input two num:")
	a = input("first:")
	b = input("second:")
	try:
		ans = int(b) + int(a)
	except ValueError:
		print("please enter number!try again.")
	else:
		print(ans)
		break

10.8

import json

num = input("please enter your favorite num:")

with open('num.json', 'w') as f_obj:
	json.dump(num,f_obj)
	
with open('num.json') as f_obj:
	num = json.load(f_obj)
	print("I know your favorite number!It's " + num)