Dosya İşlemleri (Ekleme-Arama-Silme)

import os
class patiensInfo:
    def __init__(self, name=None, surname=None, patientId=None):
        self.name = name,
        self.surname = surname,
        self.patientId = patientId,
        self.filename='patient.txt'

    def __str__(self):
        return '[Name: {0} | Surname: {1} | PatientId: {2}]'.\
            format(self.name, self.surname, self.patientId)
    def __repr__(self):
        return '[Name: {0} | Surname: {1} | PatientId: {2}]'.\
            format(self.name, self.surname, self.patientId)

    def patient_add(self):
        self.name=input("Patient name: ")
        self.surname = input("Patient surname: ")
        self.patientId = input("Patient patientId: ")
        try:
            if os.path.exists(self.filename) and os.path.getsize(self.filename)>0:
                myPatientDb= open(self.filename, 'a')
                myPatientDb.write(self.name+" "+self.surname+" "+self.patientId+"\n")
            else:
                myPatientDb = open(self.filename, 'w')
                myPatientDb.write(self.name+" "+self.surname+" "+self.patientId+"\n")
        except IOError:
            print("Bir hata oluştu!")
        finally:
            myPatientDb.close()

    def displayPatients(self):
        if os.path.exists(self.filename) and os.path.getsize(self.filename) > 0:
            myPatientDb = open(self.filename, 'r')
            for records in myPatientDb:
                    print(records, end="")
            myPatientDb.close()

    def searchPatients(self):
        if os.path.exists(self.filename) and os.path.getsize(self.filename) > 0:
            myPatientDb = open(self.filename, 'r')
            try:
                patientsSearch = input("Enter the patientId: ")
                counter = 0
                for patient in myPatientDb.readlines():
                    if patientsSearch == patient.split()[2]:
                        print(patient)
                        counter +=1
                if counter == 0:
                    print("No record found whose name is:", patientsSearch)
            except:
                print("Error occured!")
        else:
            print("No record in patient.txt")

    def deletePatient(self):
        if os.path.exists(self.filename) and os.path.getsize(self.filename)>0:
            myPatientDb = open(self.filename, 'r')
            try:
                patientsSearch = input("Enter the patientId: ")
                counter = 0
                liste = myPatientDb.readlines()
                for patient in liste:
                    if patientsSearch == patient.split()[2]:
                        k = liste.index(patient)
                        del liste[k]
                        myPatientDb.close()

                    myPatientDb = open(self.filename, 'w')
                    myPatientDb.writelines(liste)
                    myPatientDb.close()
                    counter +=1
                if counter == 0:
                    print("No record found whose name is:", patientsSearch)
            except:
                print("Error occured!")
        else:
            print("No record in patient.txt")


if __name__ == '__main__':
    ourPatiens = patiensInfo()
    print("Enter 1.To add 2.For search 3.Display 4.Delete 5.Exit")
    while True:
        choice = input("Enter your choice: ").lower()
        if choice == "1":
            ourPatiens.patient_add()
        elif choice == "2":
            ourPatiens.searchPatients()
        elif choice == "3":
            ourPatiens.displayPatients()
        elif choice == "4":
            ourPatiens.deletePatient()
        elif choice == 'q':
            exit()
        else:
            print("Invalid option. Try again!")