admin.py

import csv

class Admin:
    def __init__(self):
        self.username = None
        self.password = None

    def adminRegistration(self):
        print("----------------------------")
        print()
        with open("adminCredential.csv", 'w',newline="") as f:
            w = csv.writer(f)
            self.username = input("Enter and set username:")
            self.password = input("Enter and set your password:")

            #saving a data in database
            w.writerow([self.username,self.password])
            print("Registration succesfully")
            print()
            print("--------------------------------")

    def adminLogin(self):
        actList = [] #list for storing data and reterieving from admin credential.csv file

        with open("adminCredential.csv", 'r+',newline="") as f:
            r = csv.reader(f)
            data = list(r)
            for i in data:
                for j in i:
                    actList.append(j)

        #print actList
        while(True):
            print("---------------------")
            print()
            self.username = input("Enter username :")
            self.password = input("Enter password :")
            if self.username == str(actList[0]) and self.password == str(actList[1]):
                print()
                print("Login successfully")
                break
            else:
                print("Enter correct username and password")
            print()
            print("------------------------------------------")