In this example , you have to take number of students as input , then ask marks for three subjects as 'Physics', 'Maths', 'History', if the total number for any student is less 120 then print he failed, or else say passed.

#!/usr/bin/env python
n = int(raw_input("Enter the number of students:"))
data = {} # here we will store the data
languages = ('Physics', 'Maths', 'History') #all languages
for i in range(0, n): #for the n number of students
    name = raw_input('Enter the name of the student %d: ' % (i + 1)) #Get the name of the student
    marks = []
    for x in languages:
        marks.append(int(raw_input('Enter marks of %s: ' % x))) #Get the marks for  languages
    data[name] = marks
for x, y in data.iteritems():
    total =  sum(y)
    print "%s 's  total marks %d" % (x, total)
    if total < 120:
        print "%s failed :(" % x
    else:
        print "%s passed :)" % y

The output

[kd@kdlappy book]$ ./students.py
Enter the number of students:2
Enter the name of the student 1: Babai
Enter marks of Physics: 12
Enter marks of Maths: 45
Enter marks of History: 40
Enter the name of the student 2: Ria
Enter marks of Physics: 89
Enter marks of Maths: 98
Enter marks of History: 40
Babai 's  total marks 97
Babai failed :(
Ria 's  total marks 227
Ria passed :)