I am not understanding how to take input for which both are string and integers

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Write a program that will repeatedly take (for a student) input of this type: course_no, number_of_credits, and grade_received (eg. CSE101 4 A). These inputs are for the courses the student has done in the semester. If no input is given (i.e. just a return), that means no courses are left. From this data, print the transcript for the semester for the student as:

Course_no: grade
Course_no: grade
….

SGPA: n.nn (two decimal places)

In the transcript, the records should be printed such that they are sorted by the course_no (hint: when sorting a list of tuples/lists, the default sorting is with the first element of the tuple/list).

The course numbers are an alphanumeric string with capital letters in the start and digits at the end (e.g. CSE101, CSSS21), credits can be 1, 2 or 4, and grade can be A+ (10), A(10), A-(9), B(8), B-(7), C(6), C-(5), D(4), F(2) (the number in () is their numeric equivalent for SGPA calculation.) The SGPA is computed as (sum of: credits*grade/ total_credits). If any input is not valid, print a suitable message ("improper course no", "incorrect credit", or "incorrect grade") and ignore that input.

What I have tried:

Python

while True:

    course_no=int(input("enter course number: "))
    number_of_credits=int(input("enter number of credits: "))
    grade_received=int(input("enter grade received: "))
    l1=[]
    l1.append(course_no)
    l1.append(number_of_credits)
    l1.append(grade_received)

Posted 7-Jan-23 19:18pm

Parth 2023

Updated 7-Jan-23 23:40pm

CPallini

v2

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2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2023-01-07T21:16:00

The course number and grade, as shown in the question, are strings, not integers. So your code should be:

Python

course_no = input("enter course number: ")
number_of_credits = int(input("enter number of credits: "))
grade_received = input("enter grade received: ")

You then need to record the details in a suitable container, such as a set or map, in order to produce the correct output. See 5. Data Structures — Python 3.11.1 documentation[^].

[edit]
Corrected the grade_received item as noted by CPallini (aka Hawkeye) in Solution 2.
[/edit]

CPallini · Answer 2 · 2023-01-07T23:40:00

The input data types are:

course - string
credits - integer
grade_- string

You are required to validate inputs:

course must be a string starting with capital letters and ending with digits. You may either check it iterating over its character or using Python pattern matching facilities.
Checking for credits validity is very simple, since it must be either 1, 2 or 4.

For grade you need both to validate the input and to translate it to a numeric value (in order to compute the SGPA), a simple function can fullfill both the task at the same time, e.g:

Python

def grade_val(grade):
  d = { "A":10, "A+":10, "A-":9, "B":8, "B-":7, "C":6, "C-":5, "D":4, "F":2 }
  if grade in d:
    return d[grade]
  else:
    return -1 # this signals an invalid input

Once you've correctly handled the input values then you have to sort the data and produce the outputs. Try to proceed this way and post specific questions here if you are stuck.

I am not understanding how to take input for which both are string and integers

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I am not understanding how to take input for which both are string and integers

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