I\'m having trouble writing a GPA program in Python. Seeing as I can\'t use def

Question

I'm having trouble writing a GPA program in Python. Seeing as I can't use def or class, I'm stuck. If you can help, I'd appreciate it.

print("Welcome to the GPA Program.")
prompt = "What's the name of the transcript file? "

total_hours = 0
file_name = input(prompt)
in_file = open(file_name,"r")

  
for course in in_file:
  
dept, course_num, hours, grade = course.split(' ')
output = "{} {} {} {}".format(dept, course_num, hours, grade)
  
print(output,end = '')
  
total_hours = total_hours + int(hours)
total_points = 0

if grade == "A":
points = total_points + 4 * int(hours)

elif grade == "B":
points = total_points + 3 * int(hours)

elif grade == "C":
points = total_points + 2 * int(hours)
  
elif grade == "D":
points = total_points + 1 * int(hours)
  
elif grade == "F":
points = 0

total_points = points/4

print("Your GPA is", total_points/total_hours)
  
  
pass

in_file.close()

print("Your total hours are", total_hours)

print("Thanks for using the GPA Program!")

Explanation / Answer

grade_mapping = {'A ':4, 'B ':3, 'C ':2, 'D ':1, 'F ':0,'A':4, 'B':3, 'C':2, 'D':1, 'F':0}
# while reading from the file the grades are getting stored in the form of A , B until the end of file
# we can match both A and A with 4 and similarly for other grades as well

total_points = 0.0
total_hours = 0

print "Welcome to the GPA Program."
prompt = "What's the name of the transcript file? "
file_name = raw_input(prompt)
in_file = open(file_name,"r")

for line in in_file: # reading from the file line by line
elems = line.split(' ') # splitting with space
# finding the grade value corresponding to the grade and multiplying it with hours
total_points = total_points + grade_mapping[elems[3]] * int(elems[2])
total_hours = total_hours + int(elems[2]) # finding total hours

in_file.close()

print " Your GPA is", total_points/total_hours
print "Your total hours are", total_hours
print "Thanks for using the GPA Program!"

Assuming the input file is of the format
CS 1 2 A
EE 2 1 B
HS 3 2 C

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