Use overlapping for statements and conditional statements to obtain the mean (Python)

int student[number of students][number of subjects] = {...}, {...}, {...}, {...};   
int sum = 0; 
char studentName[5]  = { 'A', 'B', 'C', 'D', 'E' };                              

for(i: repeat as many students) {                                    
    for(j: repeat as many subjects) {                                    
        sum += student[i][j];                                     
        if (if you added the last subject of the student)                                    
        {                                    
            print(studentName[i] + "Average of students: " + sum / Number of subjects + '\n')";
        }
    }   
    sum = 0;                             
}