todoapp.py

import os

todo = []

file_read = open('todo.save','r')
lines = file_read.readlines()
#print(lines)
for line in lines:
    line = line.strip()
    todo.append(line)
file_read.close()

#input()

while True:
    os.system('cls')
    print('1-Add a task')
    print('2-Delete a task')
    print('3-List all tasks')
    print('4-Save data')
    print('5-EXIT')
    ans = input('Your choice?:  ')
    if ans == '1':
        print('Adding a task')
        print('==============')
        task = input('Enter a task: ')
        todo.append(task)

    elif ans == '2':
        print('TaskList')
        print('=========')
        count = 0
        for t in todo:
            count = count + 1
            print(f'{count} - {t}')
        d = input('Which one to delete: ')
        d = int(d)
        del todo[d-1]

        print('Updated task list')
        print('==============')
        count = 0
        for t in todo:
            count = count + 1
            print(f'{count} - {t}')

    elif ans == '3':
        print('TaskList')
        print('=========')
        count = 0
        for t in todo:
            count = count + 1
            print(f'{count} - {t}')

    elif ans == '4':
        print('Saving Data')
        save_file = open('todo.save','w')
        for item in todo:
            save_file.write(item+'\n')
        save_file.close()


    elif ans == '5':
        print('Bye')
        print('Saving Data')
        save_file = open('todo.save','w')
        for item in todo:
            save_file.write(item+'\n')
        save_file.close()
        exit(0)

    input('Press ENTER to continue...')