Program to enter 5 student mark across 4 subjects and output highest average mark of student and subject

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I am trying to write a program where i need to be able to enter 5 student marks across 4 different subjects and then output the highest average mark of both the student and the subject.

The desired input and output is :

Student 1 (courses 1-4): 50 60 70 60 
Student 2 (courses 1-4): 100 90 87 90
Student 3 (courses 1-4): 70 100 90 90
Student 4 (courses 1-4): 30 65 50 50
Student 5 (courses 1-4): 58 50 74 43
The highest average mark of students: 91.75
The highest average mark of courses: 74.2

The current code I have works for calculating for one subject and not 4. How am I able to enter 4 grades per student to get my desired output.

see my code below:

m1 = int(input("Student 1 (courses 1-4): "))
m2 = int(input("Student 2 (courses 1-4): "))
m3 = int(input("Student 3 (courses 1-4): "))
m4 = int(input("Student 4 (courses 1-4): "))
m5 = int(input("Student 5 (courses 1-4): "))

avg = (m1 + m2+ m3+ m4 + m5) / 5;
avg1 =(m1 + m2+ m3+ m4 + m5) / 20;
print("The Highest average mark of students =", avg)
print("The Highest average mark of courses =", avg1)
python-3.x python
2 Answers

This code does the job,

import pandas as pd
import numpy as np

# Part 1
student_num = 5
all_marks = []

for i in range(student_num):
  marks = input(f"Student {i + 1} (courses 1-4): ")
  all_marks.append(list(map(float, marks.split(" "))))

# Part 2
df = pd.DataFrame(all_marks, columns = ['Marks'])
course_avg = df.Marks.apply(np.mean)
student_avg = df.Marks.apply(np.mean, axis = 1)

The first part of the code converts the input into numbers and stores them into a list. This list is then converted into a data frame in Part 2. I firstly apply np.mean on the columns to find the average for each course, then on the rows to find the average for each student.

You can use idxmax() on both course_avg and student_avg to find the index of the maximum average and find the course/student with the highest average accordingly.

(It's better to store the values in a .xlsx or .csv file directly instead of inputing them through Python this way. Once you have the files, just pass the file path in pd.read_excel() or pd.read_csv() depending upon the format of the file.)

user_183206540

First, create a dictionary to take the inputs of marks for each student. Lets call it d_marks. Create a dictionary to get the average of all students. Let's call it avg_marks. Create a dictionary to get the total marks of all courses. Let's call it avg_course. After that get the max of them. Here's how you can do it:

d_marks = {}
avg_marks = {}
avg_course = {}
for i in range(1,6): # We loop for 5 students
    d_marks[f'Student {i} (courses 1-4)'] = list(map(int, input(f"Student {i} (courses 1-4): ").split())) # Split the string and creates an integer list
    avg_marks[f'Average of Student {i}'] = sum(d_marks[f'Student {i} (courses 1-4)']) / len(d_marks[f'Student {i} (courses 1-4)']) #Create average dictionary for Students
    for j in range(1, len(d_marks[f'Student {i} (courses 1-4)'])+1):
        if f'Course {j} sum' in avg_course: # if course sum already in dictionary then add it to previous. 
            avg_course[f'Course {j} sum'] += d_marks[f'Student {i} (courses 1-4)'][j-1]
        else:
            avg_course[f'Course {j} sum'] = d_marks[f'Student {i} (courses 1-4)'][j-1] # if course sum not in dictionary then create one. 

print("The Highest average mark of students =", max(avg_marks.values()))
print("The Highest average mark of courses =", max(avg_course.values())/ len(d_marks))

Output:

Student 1 (courses 1-4): 50 60 70 60
Student 2 (courses 1-4): 100 90 87 90
Student 3 (courses 1-4): 70 100 90 90
Student 4 (courses 1-4): 30 65 50 50
Student 5 (courses 1-4): 58 50 74 43
The Highest average mark of students = 91.75
The Highest average mark of courses = 74.2
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