Activity 25

There are four different ways to iterate over the contents of a dictionary. In this activity you will explore a few of them.

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

1.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     for instructor in my_dictionary:
       if 'A' in my_dictionary[instructor]:
         print(instructor, end=',')
   

2.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     for instructor, course in my_dictionary.items():
       if '120' in course:
         print(instructor, end=',')
   

3.   my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     for instructor in my_dictionary:
       if '120' in my_dictionary[instructor]:
         del my_dictionary[instructor]
     print(my_dictionary)
   

4.   value = '120B'
     key = ''
     my_dictionary = {"Smith": "120B", "Bouchard": "120A", "Shende": "250A"}
     for instructor, course in my_dictionary.items():
       if course == value:
         key = instructor
     print(key)