Module 8 Assignments

Short Project 07

Due date: Oct 29, Tuesday at 7pm

Short Programming projects are submitted during our weekly 45-minute in-person lab sessions. Each lab sessions is guided by two TAs. The instructions for the short project will be available only during the lab sessions. To schedule your lab session go to the weekly lab session spreadsheet.

Programming Problems

Programming Problems should be submitted to gradescope.

Programming Problem 15

Due date: Oct 24, Thursday at 7pm

Write a Python function that does the following:

1. Its name is count_vowels
2. It takes as argument a string
3. It iterates over the string (either with a while or for loop) counting how many lowercase and uppercase vowels the string has
4. It returns a dictionary with vowels are the keys, and integer counts as the values

Test cases:

print( count_vowels("") ) # {"a": 0, "e": 0, "i": 0, "o": 0, "u": 0,
                          #  "A": 0, "E": 0, "I": 0, "O": 0, "U": 0}
                
print( count_vowels("banana") ) # {"a": 3, "e": 0, "i": 0, "o": 0, "u": 0,
                                #  "A": 0, "E": 0, "I": 0, "O": 0, "U": 0}
                                
print( count_vowels("Adriana") ) # {"a": 2, "e": 0, "i": 1, "o": 0, "u": 0,
                                 #  "A": 1, "E": 0, "I": 0, "O": 0, "U": 0}
                                 
print( count_vowels("Hello World!") ) # {"a": 0, "e": 1, "i": 0, "o": 2, "u": 0,
                                      #  "A": 0, "E": 0, "I": 0, "O": 0, "U": 0}

Name the program vowel_counting.py. Make sure that gradescope gives you the points for passing the test case.

Programming Problem 16

Due date: Oct 24, Thursday at 7pm

Write a Python function that does the following:

1. Its name is invert_dictionary
2. It takes a single dictionary as a parameter
3. It returns a new dictionary with the original dictionary values mapped as keys, and its original keys mapped as lists of values

Test cases:

print( invert_dictionary({"a": 7, "b": 8}) ) # { 7: ["a"], 8: ["b"] }
print( invert_dictionary({"a": 2, "b": 2}) ) # { 2: ["a", "b"] }
print( invert_dictionary({}) ) # {}

Name the program inversion.py. Make sure that gradescope gives you the points for passing the test case.