this application works as a small agenda
- python3
- to run the app in the terminal(python3 main.py)
- shelve.open('database.dat', writeback=True): storage that are working as dictionary
- users identification by its name
- add tasks to your list
- modify your task
- delete your task
- show all your tasks
- add a state to each task (done or not done)
- add a time to each task (HH:MM AM|PM)
- add a date to each task (DD/MM/YY)
- number of day before the day that you will execute your task
- alarm you when the day is arrived