I do not even know where to begin! Any help would be great! Write a Python progr

Question

I do not even know where to begin! Any help would be great!

Write a Python program to read in a file of student letter grades (in a file named grades.txt), and display a count of the grades. The count of the grades are kept in a list. The grades are uppercase letters A-E. Some grades may not yet be assigned and be another uppercase letter. If a grade is not A-E display (for example):

Grade N on line 2 is not A-E

The file will contain only uppercase letters.

An example program execution using the file grades.txt:

C A B B A
D A C N
B C X C D E
C B A C C

Grade N on line 2 is not A-E
Grade X on line 3 is not A-E
[4, 4, 7, 2, 1]

The [4, 4, 7, 2, 1] is a display of the list of grades. Just print the list variable.

What you must use for this program:
-open/close file commands
-for loop to read lines from the file
-a list to keep the counts of the grades
-split function to split a line read from the file into individual grades
-for loop to read individual grades from the list created by the split command
-if-elif-else decisions to determine the grade

Explanation / Answer

import fileinput

fd = open( "c:\test.txt" )

linecount = 0

gradesList = [0, 0, 0, 0, 0]

for line in fd.readlines():

    linecount = linecount + 1

    line = str.replace(line," ","")

    grades = list()

    grades = str.split(line," ")

    for grade in grades:

        #print grade  

        if (grade=="A"):

            gradesList[0] = gradesList[0] + 1

        elif (grade=="B"):

            gradesList[1] = gradesList[1] + 1

        elif (grade=="C"):

            gradesList[2] = gradesList[2] + 1

        elif (grade=="D"):

            gradesList[3] = gradesList[3] + 1

        elif (grade=="E"):

            gradesList[4] = gradesList[4] + 1

        else:

            print "Grade "+ grade +" on line "+ str(linecount) +" is not A-E"  

    #print line   

fd.close()

outstring = "["

for item in gradesList:

    outstring = outstring + str(item) + " "

outstring = outstring + "]"

print outstring

raw_input("")

Note: Please maintain the indentation

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