1 import math

     2 

     3 f = open('/home/madhu/Desktop/marks.dat')

     4     

     5 subj_marks = [[]] * 5

     6 names = []

     7 for line in f:

     8     fields = line.split(';')

     9     names.append(fields[2])

    10     for i in range(5):

    11         subj_marks[i].append(int(fields[i+3]))

    12 

    13 for i in range(5):

    14     avg_marks = float(sum(subj_marks[i])) / len(subj_marks[i])

    15     student = names[subj_marks[i].index(max(subj_marks[i]))]

    16     sigma = 0

    17     for j in subj_marks[i]:

    18         sigma += (j - avg_marks) ** 2

    19 

    20     std_dev = math.sqrt(sigma)

    21     print "Average marks for subject: %f is Standard Deviation is %f, Student with Highest Marks is %s" % (avg_marks, std_dev, student)

    22