Activity 24

Dictionaries are very similar to Lists in Python. The only difference is that the keys (indicies) of a dictionary can be any immutable data type. This means that your indicies can be strings now! This is incredibly useful, but can open a brand new can of worms.

For each of the following, describe what you expect the program to output.

1.   my_dictionary = {"Smith": "120B", "Bouchard": "120A"}
     print(my_dictionary["Smith"])
   

2.   my_dictionary = {"Smith": "120B", "Bouchard": "120A"}
     print(my_dictionary["Shende"])
   

3.   my_dictionary = {"Smith": "120B", "Bouchard": "120A"}
     print(my_dictionary["Bouchard"])
   

4.   my_dictionary = {"Smith": "120B", "Bouchard": "120A"}
     my_dictionary["Shende"] = "250A"
     print(my_dictionary["Shende"])
   

5.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     print(my_dictionary.keys())
   

6.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     print(my_dictionary.values())
   

7.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     del my_dictionary["Bouchard"]
     print(my_dictionary.keys())
   

8.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     del my_dictionary["Minton"]
     print(my_dictionary.keys())