A date-to-event dictionary is a dictionary in which the keys are dates (as strings in the format 'YYYY-MM-DD'),and the values are lists of events that take place on that day.Complete the following function according to its docstring. Your code must not mutate the parameter!def group_by_year (events: Dict[str, List[str]]) -> Dict [str, Dict [str, List[str]]]:"""Return a dictionary in which in the keys are the years that appear inthe dates in events, and the values are the date-to-event dictionariesfor all dates in that year.>>> date_to_event = {'2018-01-17': ['meeting', 'lunch'],'2018-03-15': ['lecture'],'2017-05-04': ['gym', 'dinner']}>>> group_by_year (date_to_event){'2018': {'2018-01-17': ['meeting', 'lunch'],'2018-03-15': ['lecture']},'2017': {'2017-05-04': ['gym', 'dinner']}}|| || ||

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A date-to-event dictionary is a dictionary in which the keys are dates (as strings in the format 'YYYY-MM-DD'), and the values are lists of events that take place on that day. Complete the following function according to its docstring. Your code must not mutate the parameter!

A date-to-event dictionary is a dictionary in which the keys are dates (as strings in the format 'YYYY-MM-DD'), and the values are lists of events that take place on that day. Complete the following function according to its docstring. Your code must not mutate the parameter!

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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