Question

CSCI 145

program must be in python 3.0

grades.txt contains the final grades for students in CSCI 145. The dean would like to see a breakdown of who passed, who did not, and the total percentages of each group. Write a program that prompts for the file path to grades.txt, reads in grades.txt, and produces two files -- passed.txt and wdf.txt. passed.txt should contain the names of the students who received a grade of A, B, or C. wdf.txt should contain the names of the students who received a W, D, or F. Additionally, you should output the percentage of students who passed and the percentage of students who received a W, D, or F to the console.           

Each line in grades.txt represents a student’s name and his/her final grade. Your program should work with a grades.txt that contains an arbitrary number of lines. The lines are in the following format: name grade

For example, below is an sample of what grades.txt may look like:

grades.txt

Alice F Bob B Charles C Dawn A Eve D Fred W

                

Using the above as an example, your program should generate the following text files:

passed.txt

Bob Charles Dawn

wdf.txt

Alice Eve Fred

       Sample Execution

Grades filepath: arades.txt Percentage Passed: 50.00% Percentage WDF: 50.00%

Answer 1

Please give thumbs up, if it is helpful for you. Let me know if you have any doubt.

# -*- coding: utf-8 -*-
"""
Created on Wed Apr 25 10:24:28 2018
@author: 
"""
file = input('Grades filepath: ')  # input file

infile = open(file, 'r')  # open file to read
data = []  # to hold all the data
for line in infile:  # iterate over each line in file
    line = line.strip().split(' ')  # seperate each file line using space
    data.append(line)
infile.close()  # close file

passed = []  # empty list to hold passed students
wdf = []  # empty list to hold wdf students

for val in data:
    if val[1] in 'ABC':
        passed.append(val)
    else:
        wdf.append(val)

outfile1 = open('passed.txt', 'w')  # open file to write passed students
outfile2 = open('wdf.txt', 'w')  # open file to write wdf students

for val in passed:
    outfile1.write(val[0] + '\n')  # writing to file..passed students
for val in wdf:
    outfile2.write(val[0] + '\n')  # writing to file..wdf students

perc_pass = len(passed) / len(data) * 100  # find passed percentage
perc_wdf = len(wdf) / len(data) * 100  # find wdf percentage

print('Percentage Passed: ' + str(round(perc_pass, 2)) + '%')
print('Percentage WDF: ' + str(round(perc_wdf, 2)) + '%')

outfile1.close()  # close file
outfile2.close()  # close file

Output: