Question

Python please help! Thanks you

Write a code to get an unlimited number of grades from the user (the user can press enter to finish the grades input, or use a sentinel, for example-1), and then calculate the GPA of all the grades and displays the GPA To do this you might need some help. Try to follow the following process (and check your progress by printing different values to make sure they are as they supposed to be): 1- Make an empty list (this is the list that you will save all the grades in). You can write something like grades ]. This will make an empty list with the name grades. 2- Ask for the first grade (or press enter to end). 3- Write a code for a while loop such that it will keep iterating until the user enters the sentinel (or pressing enter). 4- In the while loop, append the first grade to your grades list. Don't forget to convert the grade to a float number before appending 5 Still in ihe loop, ask for the next grade. 6- Up to now, if you run the program (and print your grades list), you should have a list of all the entered grades 7- Now write a for loop to go over all elements of the grades list. Before starting the loop, assign zero to a variable (for example sum) which is keeping a running total of all.of the grades. Inside the loop, now that you are going all the items in the grades list individually, add them one by one to the variable sum. 8. Now you can print the variable sum and it should correctly show the total value of adding all list items. 9- The last step before displaying the result is to calculate GPA, which is basically the sum of all items (which you just ted) over the total number of items in the list (which can be found using the len function) 10- And finally, display the GPA

Answer 1

# your code goes here
import sys
#grades list
grades=[]
#enter the loop
x=input("Enter the first grade or press enter to exit")
if not(x):
   #if no grade entered print 0
   print(0)
else:
   grades.append(int(x,10))
   while(1<2):
       print("Enter the grade or press enter or input -1 to exit ")
       #take input
       x=input()
       #if x is enter break
       if not(x):
           break
       #if x is -1 break
       elif x=="-1":
           break
       #else convert x to string and append to grades
       else:
           grades.append(int(x,10))
   #sum the grades      
   total=0
   for i in grades:
       total=total+i
   #print gpa
   print(total/len(grades))