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Simple Dictionary Program in Python


Program to store student details in dictionary and find the average marks of the given student !

Python Program - dictionary.py

from __future__ import division
import sys

dct = {};
#get n - number of students
n = int(raw_input());
if ( n >= 2) and (n <= 10) :
        for i in range(0,n):
                #read student details
                info = raw_input()
                new_info = info.split()
                name = new_info[0]
                del new_info[0]
                dct[name] = []

                for j in range(0,3):
                        marks = float(new_info[j])
                        if ((marks >= float(0)) and (marks <= float(100))):
                                dct[name].append(marks)
                        else:
                                print("invalid marks for one of the student - >=0 and <= 100")
                                sys.exit(0)
        print "dictionary details :- %s" % str(dct)
        #retrive student details
        info = raw_input()
        marks = 0
        if (info in dct):
                for j in dct[info]:
                        marks += j

                print format(marks/3,'.2f')
        else:
                print("Student not found")

else:
        print("invalid n value - n >= 2 and n <= 10")
        sys.exit(0)

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