Module 9 Assignments

Short Project 07

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 in Short Project Dates and Instructions.

Programming Problems

Programming Problems should be submitted to gradescope.

Programming Problem 17

Due date: Friday, March 28, 2025 at 9pm

Write a Python function that does the following:

  1. Its name is read_csv
  2. It takes a string as argument called file_name
  3. It opens the file with file_name in read mode
  4. It iterates over each line in the file, splitting each line by ","
  5. It creates a dictionary where the keys are the first item in each line, and the values are the other values (in a list)
  6. It returns the dictionary

Test cases:

contents of stipends.csv:

Peter,1000
Joan,50500
Mary,2400
print( read_csv("stipends.csv") ) # {"Peter": [1000], 
                                  #  "Joan": [50500],
                                  #  "Mary": [2400]}

contents of population.csv:

Country,United States,Brazil,Mexico,Canada
Population (in mil),331.00,212.56,128.93,37.74
print( read_csv("population.csv") ) # {"Country": ["United States", "Brazil", "Mexico", "Canada"],
                                    #  "Population (in mil)": [331.00, 212.56, 128.93, 37.74]}

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

Programming Problem 18

Due date: Friday, March 28, 2025 at 9pm

Write a Python function that does the following:

  1. Its name is write_csv
  2. It takes a dictionary and a string file_name as arguments
  3. It opens the file with file_name in write mode
  4. It iterates over the dictionary to write lines to the opened .csv
  5. Each key is the first element of the line, the values are lists that contain the other values in the line

Test cases:

my_data = {"Peter": [1000], "Joan": [50500], "Mary": [2400]}
write_csv(my_data, "stipends.csv")

This is what stipends.csv should contain:

Peter,1000
Joan,50500
Mary,2400
my_data = {"Country": ["United States", "Brazil", "Mexico", "Canada"],
           "Population (in mil)": [331.00, 212.56, 128.93, 37.74]}
write_csv(my_data, "population.csv")

This is what population.csv should contain:

Country,United States,Brazil,Mexico,Canada
Population (in mil),331.0,212.56,128.93,37.74

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