Python program to sort and find the data in the student records

Consider a software for maintaining records of the students in a class. Consider the following functions which are required to be performed:

1. Sorting of names according to First Name of the students.
2. Finding the Minimum marks among all the marks
3. Finding contact number of student using his/her First Name.

The task is to write a Python program to implement the software having these three functionalities.

Approach: For the above problem we should use a dictionary that either takes a name as a whole to key and other data as value to it or vice versa. Here I have taken the name as a key and contact number, marks as the value associated with the name. So at first the user needs to enter the details of the students and these details will be stored in dictionary as {[‘first name’, ‘second name’]:(‘contact number’, ‘marks’)}. Then we create a new list of tuples that store data according to the function requirement. In the program four user-defined functions have been created:

1. sort( ) function that sorts the record based on the first name.
2. minmarks( ) function that finds the minimum marks from all records.
3. searchdetail( ) function that takes first name as an input and fetch student contact number from the corresponding record.
4. option() function for showing the options.

Below is the implementation:

Python3

print("-----Program for Student Information-----")

D = dict()

n = int(input('How many student record you want to store?? '))

# Add student information
# to the dictionary
for i in range(0,n):
    x, y = input("Enter the complete name (First and last name) of student: ").split()
    z = input("Enter contact number: ")
    m = input('Enter Marks: ')
    D[x, y] = (z, m)

# define a function for shorting
# names based on first name
def sort():
    ls = list()
    # fetch key and value using
    # items() method
    for sname,details in D.items():

        # store key parts as an tuple
        tup = (sname[0],sname[1])

        # add tuple to the list
        ls.append(tup)

    # sort the final list of tuples
    ls = sorted(ls)
    for i in ls:

        # print first name and second name
        print(i[0],i[1])
    return

# define a function for
# finding the minimum marks
# in stored data
def minmarks():
    ls = list()
    # fetch key and value using
    # items() methods
    for sname,details in D.items():
        # add details second element
        # (marks) to the list
        ls.append(details[1])

    # sort the list elements
    ls = sorted(ls)
    print("Minimum marks: ", min(ls))

    return

# define a function for searching
# student contact number
def searchdetail(fname):
    ls = list()

    for sname,details in D.items():

        tup=(sname,details)
        ls.append(tup)

    for i in ls:
        if i[0][0] == fname:
            print(i[1][0])
    return

# define a function for
# asking the options
def option():

    choice = int(input('Enter the operation detail: \n \
    1: Sorting using first name \n \
    2: Finding Minimum marks \n \
    3: Search contact number using first name: \n \
    4: Exit\n \
    Option: '))

    if choice == 1:
        # function call
        sort()
        print('Want to perform some other operation??? Y or N: ')
        inp = input()
        if inp == 'Y':
            option()

        # exit function call
        exit()

    elif choice == 2:
        minmarks()
        print('Want to perform some other operation??? Y or N: ')

        inp = input()
        if inp == 'Y':
            option()
        exit()

    elif choice == 3:
        first = input('Enter first name of student: ')
        searchdetail(first)

        print('Want to perform some other operation??? Y or N: ')
        inp = input()
        if inp == 'Y':
            option()

        exit()
    else:
        print('Thanks for executing me!!!!')
        exit()

option()

Output:

-----Program for Student Information-----
How many student record you want to store?? 3
Enter the complete name (First and last name) of student: shubham shukla
Enter contact number: 1234567890
Enter Marks: 85
Enter the complete name (First and last name) of student: rinki singh
Enter contact number: 0987654321
Enter Marks: 50
Enter the complete name (First and last name) of student: abhishek sharma
Enter contact number: 5432167890
Enter Marks: 65
Enter the operation detail: 
     1: Sorting using first name 
     2: Finding Minimum marks 
     3: Search contact number using first name: 
     4: Exit
     Option: 1
abhishek sharma
rinki singh
shubham shukla
Want to perform some other operation??? Y or N: 
Y
Enter the operation detail: 
     1: Sorting using first name 
     2: Finding Minimum marks 
     3: Search contact number using first name: 
     4: Exit
     Option: 2
Minimum marks:  50
Want to perform some other operation??? Y or N: 
Y
Enter the operation detail: 
     1: Sorting using first name 
     2: Finding Minimum marks 
     3: Search contact number using first name: 
     4: Exit
     Option: 3
Enter first name of student: rinki
0987654321
Want to perform some other operation??? Y or N: 
N