CSV Processor

In this short PA, you will be writing a program that reads in a CSV file with no column labels, and can compute a maximum, minimumi, and average of a column. Name the program csv_processor.py. Your program should ask the user for three input values:

• The name of the CSV file to read
• The column number to compute on
• The operation to perform.

Below, and example is show of the program accepting these three values from the user.

Enter CSV file name:
numbers.csv
Enter column number:
1
Enter column operation:
avg

After getting all of this information from the user, your program should do the following:

• Open up the CSV file. You can assume that the CSV file does not have a row with column labels, and that all of the values will be integers of floats.
• Read all of the values into a 2D list. You can loop through each line of the file, and split each line on ,. You can append the list that split returns to another list.
• Calculate the desired operation. This should be either min, max, or avg.

You should structure the code into either three or four functions:

• main, to get user inputs and read in the file
• One function for each operation (min, max, avg)

Walk Through

Let’s walk through an example. Let’s say that you requested your program to operate on numbers.csv, and it had the below contents:

1.5,2.0,3.0
8.0,5.0,7.0
3.0,2.0,2.0
2.0,2.0,2.0

That CSV file has four rows and three columns. You should store all of the values into a 2D list. Now, say that the user requested the min (minimum) calculation on column 2. The code should loop through the rows of the 2D list, sum up the numeric values, and then calculate the minimum value. It should print:

The minimum for column 2 is: 2.0

The max of column 2 would be 5.0 and the avg would be 2.75.

NOTE: The avg feature is extra credit for this short PA.

Complete Examples

Below are three complete examples. These examples use a file named numbers.txt with the same contents shown earlier. You can also use Gradescope to test your program.

Enter CSV file name:
numbers.csv
Enter column number:
1
Enter column operation:
avg
The average for column 1 is: 3.625

Enter CSV file name:
numbers.csv
Enter column number:
1
Enter column operation:
min
The minimum value in column 1 is: 1.5

• numbers.csv
• more_numbers.csv

Restrictions

• You should not use the built-in max, min, or avg python functions

Submission

Submit to Gradescope by Saturday, April 10th, by 7pm. You may not use a late day. There will be some Gradescope test cases for min and max.