Python Taskbook Level 8.9

Задание 1

Given a dictionary with a to-do list for a specific date:

pythonaffairs = {
  '2019-12-31': ['to-do list calendar'],
  '2018-11-29': ['to-do list calendar'],
  '2018-11-30': ['to-do list calendar'],
  '2018-12-27': ['to-do list calendar'],
  '2019-12-29': ['to-do list calendar'],
  '2019-12-30': ['to-do list calendar'],
  '2018-12-30': ['to-do list calendar'],
  '2018-12-31': ['to-do list calendar'],
}

Display all cases for 2018 year.