Python Taskbook Level 8.8

Given a number, check if this number is perfect.

Given a list of events for specific months, stored in the following structure:

events = [
	{
		'date':  '2019-12'
		'event': 'name1'
	},
	{
		'date':  '2019-12'
		'event': 'name2'
	},
	{
		'date':  '2019-11'
		'event': 'name3'
	},
	{
		'date':  '2019-11'
		'event': 'name4'
	},
	{
		'date':  '2020-10'
		'event': 'name5'
	},
	{
		'date':  '2020-10'
		'event': 'name6'
	},
	{
		'date':  '2020-11'
		'event': 'name5'
	},
	{
		'date':  '2020-11'
		'event': 'name6'
	},
	{
		'date':  '2020-12'
		'event': 'name7'
	},
	{
		'date':  '2020-12'
		'event': 'name8'
	},
	{
		'date':  '2020-12'
		'event': 'name9'
	},
]

Write code that will remake the data structure into this:

{
	2019: {
		11: [list of events],
		12: [list of events],
	},
	2020: {
		10: [list of events],
		11: [list of events],
		12: [list of events],
	}
}