https://eduschool40.blog/%d9%83%d8%aa%d8%a7%d8%a8-%d9%8a%d8%aa%d8%b6%d9%85%d9%86-100-%d8%aa%d9%85%d8%b1%d9%8a%d9%86-%d8%a8%d9%84%d8%ba%d8%a9-python-%d9%84%d9%84%d9%85%d8%a8%d8%aa%d8%af%d8%a6%d9%8a%d9%86-%d8%aa%d9%85-%d8%ad/