Subclass the dict built-in
Level: Intermediate (score: 3)
In this Bite, you will subclass UserDict from collections to support a birthday dictionary.
This dictionary takes names as keys and birthday dates as values. Implement the __setitem__ dunder method to print a message every time somebody gets added with a birthday that is already in the dictionary. It should work like this when running it in the REPL:
>>> from datetime import date >>> from bdaydict import BirthdayDict >>> bd = BirthdayDict() >>> bd['bob'] = date(1987, 6, 15) >>> bd['tim'] = date(1984, 7, 15) >>> bd['mary'] = date(1987, 6, 15) # whole date match Hey mary, there are more people with your birthday! >>> bd['sara'] = date(1987, 6, 14) >>> bd['mike'] = date(1981, 7, 15) # day + month match Hey mike, there are more people with your birthday!
So if day and month are the same, you have a match; the year can be different. Use MSG to print the message, replacing {} with the name key of the newly added person.
Note that this exercise is meant to get you thinking about subclasses and extending built-in behavior. Instead of subclassing dict directly, we use UserDict, which provides better flexibility and ensures that overridden methods behave consistently.
Good luck and have fun!