Dictionaries

redd

1. # Assigning a dictionary with three key-value pairs to residents:
   
2. residents = {'Puffin' : 104, 'Sloth' : 105, 'Burmese Python' : 106}
   
3. 
   
4. print residents['Puffin'] # Prints Puffin's room number
   
5. print residents['Sloth']
   
6. print residents['Burmese Python']

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redd

1. menu = {} # Empty dictionary
   
2. menu['Chicken Alfredo'] = 14.50 # Adding new key-value pair
   
3. print menu['Chicken Alfredo']
   
4. 
   
5. menu['Juice'] = 4.50
   
6. menu['Rice'] = 4.50
   
7. menu['Cake'] = 4.50
   
8. 
   
9. print "There are " + str(len(menu)) + " items on the menu."
   
10. print menu

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redd

1. # key - animal_name : value - location
   
2. zoo_animals = { 'Unicorn' : 'Cotton Candy House',
   
3. 'Sloth' : 'Rainforest Exhibit',
   
4. 'Bengal Tiger' : 'Jungle House',
   
5. 'Atlantic Puffin' : 'Arctic Exhibit',
   
6. 'Rockhopper Penguin' : 'Arctic Exhibit'}
   
7. # A dictionary (or list) declaration may break across multiple lines
   
8. 
   
9. # Removing the 'Unicorn' entry. (Unicorns are incredibly expensive.)
   
10. del zoo_animals['Unicorn']
    
11. 
    
12. # Your code here!
    
13. del zoo_animals['Sloth']
    
14. del zoo_animals['Bengal Tiger']
    
15. zoo_animals['Rockhopper Penguin'] = 'Taiwan'
    
16. 
    
17. print zoo_animals

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redd

1. inventory = {
   
2.     'gold' : 500,
   
3.     'pouch' : ['flint', 'twine', 'gemstone'], # Assigned a new list to 'pouch' key
   
4.     'backpack' : ['xylophone','dagger', 'bedroll','bread loaf']
   
5. }
   
6. 
   
7. # Adding a key 'burlap bag' and assigning a list to it
   
8. inventory['burlap bag'] = ['apple', 'small ruby', 'three-toed sloth']
   
9. 
   
10. # Sorting the list found under the key 'pouch'
    
11. inventory['pouch'].sort()
    
12. 
    
13. # Your code here
    
14. inventory['pocket'] = ['seashell', 'strange berry', 'lint']
    
15. inventory['backpack'].sort()
    
16. inventory['backpack'].remove('dagger')
    
17. inventory['gold'] += 50

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redd

1. prices = {
   
2.     "banana": 4,
   
3.     "apple": 2,
   
4.     "orange": 1.5,
   
5.     "pear": 3
   
6. }

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redd

1. prices = {
   
2.     "banana" : 4,
   
3.     "apple"  : 2,
   
4.     "orange" : 1.5,
   
5.     "pear"   : 3,
   
6. }
   
7. stock = {
   
8.     "banana" : 6,
   
9.     "apple"  : 0,
   
10.     "orange" : 32,
    
11.     "pear"   : 15,
    
12. }
    
13. 
    
14. total = 0
    
15. 
    
16. for key in prices:
    
17.     print key
    
18.     print "price: %s" % prices[key]
    
19.     print "stock: %s" % stock[key]
    
20.     sub_total = prices[key] * stock[key]
    
21.     print "sub total: %s" % sub_total
    
22.     total = total + sub_total
    
23. 
    
24. print total

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用水果的價格及數量算出總金額

redd

1. lloyd = {
   
2.     "name": "Lloyd",
   
3.     "homework": [90.0, 97.0, 75.0, 92.0],
   
4.     "quizzes": [88.0, 40.0, 94.0],
   
5.     "tests": [75.0, 90.0]
   
6. }
   
7. alice = {
   
8.     "name": "Alice",
   
9.     "homework": [100.0, 92.0, 98.0, 100.0],
   
10.     "quizzes": [82.0, 83.0, 91.0],
    
11.     "tests": [89.0, 97.0]
    
12. }
    
13. tyler = {
    
14.     "name": "Tyler",
    
15.     "homework": [0.0, 87.0, 75.0, 22.0],
    
16.     "quizzes": [0.0, 75.0, 78.0],
    
17.     "tests": [100.0, 100.0]
    
18. }
    
19. students = [lloyd, alice, tyler]
    
20. 
    
21. for x in students:
    
22.     print x["name"]
    
23.    
    
24. for y in students:
    
25.     print y["homework"]
    
26.    
    
27. for z in students:
    
28.     print z["quizzes"]
    
29.    
    
30. for o in students:
    
31.     print o["tests"]

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