Problem Statement: Write a program to build a simple Student Management System using Python which can perform the following operations:
- Accept
- Display
- Search
- Delete
- Update
Prerequisite: Classes and objects in python
Approach: Below is the approach to doing the above operations:
- Accept – This method takes details from the user like name, roll number, and marks for two different subjects.
# Method to enter new student details
def accept(self, Name, Rollno, marks1, marks2 ):
# Creates a new class constructor
# and pass the details
ob = Student(Name, Rollno, marks1, marks2 )
# list containing objects of student class
ls.append(ob)
- Display – This method displays the details of every student.
# Function to display student details
def display(self, ob):
print("Name : ", ob.name)
print("RollNo : ", ob.rollno)
print("Marks1 : ", ob.m1)
print("Marks2 : ", ob.m2)
print("\n")
- Search – This method searches for a particular student from the list of students. This method will ask the user for roll number and then search according to the roll number
# Search Function
def search(self, rn):
for i in range(ls.__len__()):
# iterate through the list containing
# student object and checks through
# roll no of each object
if(ls[i].rollno == rn):
# returns the object with matching
# roll number
return i
- Delete – This method deletes the record of a particular student with a matching roll number.
# Delete Function
def delete(self, rn):
# Calls the search function
# created above
i = obj.search(rn)
del ls[i]
- Update – This method updates the roll number of the student. This method will ask for the old roll number and new roll number. It will replace the old roll number with a new roll number.
# Update Function
def update(self, rn, No):
# calling the search function
# of student class
i = obj.search(rn)
ls[i].rollno = No
Below is the implementation of the above approach:
Python3
# This is simplest Student data management program in python# Create class "Student"class Student: # Constructor def __init__(self, name, rollno, m1, m2): self.name = name self.rollno = rollno self.m1 = m1 self.m2 = m2 # Function to create and append new student def accept(self, Name, Rollno, marks1, marks2): # use ' int(input()) ' method to take input from user ob = Student(Name, Rollno, marks1, marks2) ls.append(ob) # Function to display student details def display(self, ob): print("Name : ", ob.name) print("RollNo : ", ob.rollno) print("Marks1 : ", ob.m1) print("Marks2 : ", ob.m2) print("\n") # Search Function def search(self, rn): for i in range(ls.__len__()): if(ls[i].rollno == rn): return i # Delete Function def delete(self, rn): i = obj.search(rn) del ls[i] # Update Function def update(self, rn, No): i = obj.search(rn) roll = No ls[i].rollno = roll# Create a list to add Studentsls = []# an object of Student classobj = Student('', 0, 0, 0)print("\nOperations used, ")print("\n1.Accept Student details\n2.Display Student Details\n3.Search Details of a Student\n4.Delete Details of Student\n5.Update Student Details\n6.Exit")# ch = int(input("Enter choice:"))# if(ch == 1):obj.accept("A", 1, 100, 100)obj.accept("B", 2, 90, 90)obj.accept("C", 3, 80, 80)# elif(ch == 2):print("\n")print("\nList of Students\n")for i in range(ls.__len__()): obj.display(ls[i])# elif(ch == 3):print("\n Student Found, ")s = obj.search(2)obj.display(ls[s])# elif(ch == 4):obj.delete(2)print(ls.__len__())print("List after deletion")for i in range(ls.__len__()): obj.display(ls[i])# elif(ch == 5):obj.update(3, 2)print(ls.__len__())print("List after updation")for i in range(ls.__len__()): obj.display(ls[i])# else:print("Thank You !") |
Output:
Operations used, 1.Accept Student details 2.Display Student Details 3.Search Details of a Student 4.Delete Details of Student 5.Update Student Details 6.Exit List of Students Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : B RollNo : 2 Marks1 : 90 Marks2 : 90 Name : C RollNo : 3 Marks1 : 80 Marks2 : 80 Student Found, Name : B RollNo : 2 Marks1 : 90 Marks2 : 90 2 List after deletion Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : C RollNo : 3 Marks1 : 80 Marks2 : 80 2 List after updation Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : C RollNo : 2 Marks1 : 80 Marks2 : 80 Thank You !
