Q:

OOP and files handling python programming project

belongs to collection: python projects for beginners

0

Suppose student course information is stored in text files.

Develop a menu driven complete python program that can perform the following options:

  1. Adding Students to the class
  2. Removing students from the class
  3. Modifying student information
  4. Show all students
  5. Show top 10 students
  6. Show students with largest absences
  7. Terminate a program

 

The student’s information is stored in a file. Each line represents a student record. The record has the following information. Note the Total Marks are computed automatically.

note: apply the OOP Concepts in this project

 

All Answers

need an explanation for this answer? contact us directly to get an explanation for this answer

Main Menu      

1- Adding Students to the class

2- Removing students from the class

3- Modifying student information

4- Show all students

5- Show top 10 students

6- Show students with largest absences

7- Terminate a program

    1

Enter Student ID:1111

Enter Student Firstname:hesham

Enter Student Familyname:ali

Enter Student Absences days:2

Enter Student Exam1 grade:70

Enter Student Exam2 grade:30

Student added !

     Main Menu      

1- Adding Students to the class

2- Removing students from the class

3- Modifying student information

4- Show all students

5- Show top 10 students

6- Show students with largest absences

7- Terminate a program

    

need an explanation for this answer? contact us directly to get an explanation for this answer
need an explanation for this answer? contact us directly to get an explanation for this answer

class Student :
    def __init__(self,ID,Firstname,Familyname,absence,Exam1,Exam2) :
        """initializes the student; Add new Student"""
        self._ID = ID
        self._FirstName = Firstname
        self._FamilyName = Familyname
        self._absences = absence
        self._Exam1= Exam1
        self._Exam2= Exam2
        self._TotalGrade= int(Exam1)+int(Exam2)

    def getID(self):
        return self._ID

    def get_name(self):
        """ returns the student name"""
        return self._FirstName+' '+self._FamilyName
    def get_absence(self):
        return self._absences
    def get_exam1(self):
        """get exam1  grade  """
        return self._Exam1
    def get_exam2(self):
        """get exam2  grade """
        return self._Exam2
    def set_ID(self,ID):
         self._ID=ID
    def set_name(self,Name):
        """ set the student name"""
        self._FirstName ,self._FamilyName = Name.split()
    def set_absence(self,absence):
        self._absences=absence
    def set_exam1(self,Exam1):
        """set exam1  grade  """
        self._Exam1 = Exam1
    def set_exam2(self,Exam2):
        """get exam2  grade """
        self._Exam2 = Exam2
    def calculate_total(self):
        """get exam2  grade """
        return self._Exam1+self._Exam2
    def PrintStudent(self):
        print(self._FirstName+',  '+self._FamilyName+',  '+self._absences+', '+self._Exam1+', '+self._Exam2+', '+str(self._TotalGrade)+'\n')


class Class :
    def __init__(self):
        """Sets up a class to hold and update students"""
        self.students = []
    def addStudent(self,ID,Firstname,Familyname,absence,Exam1,Exam2):
        student = Student(ID,Firstname,Familyname,absence,Exam1,Exam2)
        self.students.append(student)
    def delStudent(self,student):
        self.students.remove(student)
    def getStudentByID(self,ID):
        for student in self.students:
            if student._ID == ID:
                return student
    def getStudentByName(self,FirstName):
        StudentsByName = []
        for student in self.students:
            if student._FirstName == FirstName:
                StudentsByName.append(student)
        return StudentsByName
    
    def modifyStudentID(self,Student,newID):
        Student.set_ID(newID)
        return Student
    def modifyStudentName(self,Student,newName):
        Student.set_name(newName)
        return Student
    def modifyStudentAbsence(self,Student,newAbsence):
        Student.set_absence(newAbsence)
        return Student
    def modifyStudentExam1(self,student,newExam1):
        student.set_exam1(newExam1)
        return student
    def modifyStudentExam2(self,student,newExam2):
        student.set_exam2(newID)
        return student
    def modifyStudent(self,student):
        EditedStudent = Student(student._ID,student._Firstname,student._Familyname,student._absence,student._Exam1,student._Exam2)
        delStudent(student)
        addStudent(EditedStudent)
        
    def ShowByID(self):
        return sorted(self.students, key= lambda e:e._ID)
    def ShowByName(self):
        return sorted(self.students, key= lambda e:e._FirstName)
    def ShowByAbsences(self):
        return sorted(self.students, key= lambda e:e._absences, reverse=True)
    def ShowByTotal(self):
        return sorted(self.students, key= lambda e:e._TotalGrade, reverse=True)
    def GetStudentAbsences(self):
        AbsentStudent= self.students[0]
        for student in self.students:
            if(student._absences>AbsentStudent._absences):
                AbsentStudent=student
        return AbsentStudent

def read_data(filename):
    c = Class()
    with open(filename, "r") as ClassStudents:
        for line in ClassStudents:
            ID,Firstname,Familyname,absence,Exam1,Exam2,total = line.strip().split(',')
            c.addStudent(ID,Firstname,Familyname,absence,Exam1,Exam2)
    return c

def Save_Quit(Students,filename):
    f = open(filename, "w")
    for student in Students:
        line=student._ID+','+student._FirstName+','+student._FamilyName+','+student._absences+','+student._Exam1+','+student._Exam2+','+str(student._TotalGrade)+'\n'
        f.write(line)
    print('Students data Saved!')
    f.close()
    
def TestAttribute(Att,type):
    if Att == '':
        return 'You cannot skip this attribute!\n'
    if type == 'int':
        if not Att.isnumeric():
            return 'Enter only numeric values Please!'
    elif type == 'str':
        if not Att.replace(" ", "").isalpha():
            if "'" not in Att:
                return 'Enter only Alphabetic values Please!'
                
def add_new_student(c):
    ID = input('Enter Student ID:')
    while TestAttribute(ID,'int'):
        print(TestAttribute(ID, 'int'))
        ID = input('Enter Student ID:')
    firstname = input('Enter Student Firstname:')
    while TestAttribute(firstname,'str'):
        print(TestAttribute(firstname, 'str'))
        firstname = input('Enter Student Firstname:')
    familyname = input('Enter Student Familyname:')
    while TestAttribute(familyname,'str'):
        print(TestAttribute(familyname, 'str'))
        familyname = input('Enter Student Familyname:')
    Absences = input('Enter Student Absences days:')
    while TestAttribute(Absences,'int'):
        print(TestAttribute(Absences, 'int'))
        Absences = input('Enter Student Absences days:')
    Exam1 = input('Enter Student Exam1 grade:')
    while TestAttribute(Exam1,'int'):
        print(TestAttribute(Exam1, 'str'))
        Exam1 = input('Enter Student Exam1 grade:')
    Exam2 = input('Enter Student Exam2 grade:')
    while TestAttribute(Exam2,'int'):
        print(TestAttribute(Exam2, 'int'))
        Exam2 = input('Enter Student Exam2 grade:')
    c.addStudent(ID,firstname,familyname,Absences,Exam1,Exam2)
    print('Student added !')

def main_menu(c,filename):
    print('Main Menu'.center(20))
    fn_no = input('''1- Adding Students to the class
2- Removing students from the class
3- Modifying student information
4- Show all students
5- Show top 10 students
6- Show students with largest absences
7- Terminate a program
    ''')
    
    if int(fn_no) in range(1, 8):
        if fn_no == '1':
            add_new_student(c)
            main_menu(c,filename)
        elif fn_no=='2':
            del_by = input('''a. By ID
b. By Student Name
    ''')
            if del_by == 'a':
                ID=input('Enter ID of the Student you wish to remove,')
                student=c.getStudentByID(ID)
                c.delStudent(student)
                print("Student removed!")
                main_menu(c,filename)
                
            elif del_by == 'b':
                Name=input('Enter FirstName of the Student you wish to remove,')
                students=c.getStudentByName(Name)
                if students:
                    print("Records found under name ("+Name+')\n')
                else:
                    print("No student with this name found!")
                    main_menu(c,filename)
                for idx,student in enumerate(students):
                    print(str(idx) +': ')
                    student.PrintStudent() 
                index=input('Please select which record to remove:')
                c.delStudent(students[int(index)])
                print("Student removed!")
                main_menu(c,filename)
            else:
                print("input not recognised. please try again...")
                main_menu(c,filename)

        elif fn_no == '3':
            ID = input('a. Retrieve information by ID:')
            student=c.getStudentByID(ID)
            print("Choose what to edit ")
            select = input('''a. ID
b. NAME
c. Absences
d. Exam1
e. Exam2
''')
            if select == 'a':
                newID = input('Please enter the new ID:')
                while TestAttribute(newID,'int'):
                    print(TestAttribute(newID, 'int'))
                    newID = input('Please enter the new ID:')
                c.modifyStudentID(student,newID)
                print("Student Edited!")
                main_menu(c,filename)

            elif select == 'b':
                newname = input('Please enter the new Name:')
                while TestAttribute(newname,'str'):
                    print(TestAttribute(newname, 'str'))
                    newname = input('Please enter the new Name:')
                c.modifyStudentName(student,newname)
                print("Student Edited!")
                main_menu(c,filename)
            elif select == 'c':
                newAbesences = input('Please enter the new Absence days:')
                while TestAttribute(newAbesences,'int'):
                    print(TestAttribute(newAbesences, 'int'))
                    newAbesences = input('Please enter the new Absence days:')
                c.modifyStudentAbsence(student,newAbesences)
                print("Student Edited!")
                main_menu(c,filename)
            elif select == 'd':
                newExam1 = input('Please enter the new grade for Exam1:')
                while TestAttribute(newExam1,'int'):
                    print(TestAttribute(newExam1, 'int'))
                    newExam1 = input('Please enter the new grade for Exam1:')
                c.modifyStudentExam1(student,newExam1)
                print("Student Edited!")
                main_menu(c,filename)
            elif select == 'e':
                newExam2 = input('Please enter the new Grade for Exam2:')
                while TestAttribute(newExam2,'int'):
                    print(TestAttribute(newExam2, 'int'))
                    newExam2 = input('Please enter the new Grade for Exam2:')
                c.modifyStudentExam2(student,newExam2)
                print("Student Edited!")
                main_menu(c,filename)
            else:
                print("input not recognised. please try again...")
                main_menu(c,filename)
        elif fn_no == '4':
            select = input('''a. Sort by ID
b. Sort by Name
c. Sort by Total Marks
d. Sort by Absences
''')
            if select == 'a':
                students=c.ShowByID()
                for student in students:
                    print(student._ID+': ')
                    student.PrintStudent()
                main_menu(c,filename)
            elif select == 'b':
                students=c.ShowByName()
                for student in students:
                    print(student._ID+': ')
                    student.PrintStudent()
                main_menu(c,filename)
            elif select == 'c':
                students=c.ShowByTotal()
                for student in students:
                    print(student._ID+': ')
                    student.PrintStudent()
                main_menu(c,filename)
            elif select == 'd':
                students=c.ShowByAbsences()
                for student in students:
                    print(student._ID+': ')
                    student.PrintStudent()
                main_menu(c,filename)
            else:
                print("input not recognised. please try again...")
                main_menu(c,filename)
        elif fn_no == '5':
            students=c.ShowByTotal()
            print("The top 10 Students: \n")
            for student in students[:9]:
                print(student._ID+': ')
                student.PrintStudent()
            main_menu(c,filename)
        elif fn_no == '6':
            print("The Student who  has the largest number of absences in the class:\n")
            student=c.GetStudentAbsences()
            print(student._ID+': ')
            student.PrintStudent()
            main_menu(c,filename)
        elif fn_no == '7':
            Save_Quit(c.students,filename)
    else:
        print("input not recognised. please try again...")
        main_menu(c,filename)
        


filename='students.txt'
c=read_data(filename)
main_menu(c,filename)        

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (2)

This question belongs to these collections

Similar questions


need a help?


find thousands of online teachers now
<< ATM machine program using python programming langu...