Problem 3: Write a function that takes in a string as input and returns a list of the unique characters used in the string. Punctuation should not be counted as a unique character. For our purposes you may consider the following characters as punctuation:.,;:?!"'- Your list should return all letters as lower case and sorted. So for example if the input is ' Happy days are here again! 'your function should return the list ['a 'r' 'y']

Problem 3: Write a function that takes in a string as input and returns a list of the unique characters used in the string. Punctuation should not be counted as a unique character. For our purposes you may consider the following characters as punctuation:.,;:?!"'- Your list should return all letters as lower case and sorted. So for example if the input is ' Happy days are here again! 'your function should return the list ['a 'r' 'y']

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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Problem 3: Write a function that takes in a string as input and returns a list of the unique characters used in the string.
Punctuation should not be counted as a unique character. For our purposes you may consider the following characters as
punctuation:.,;:?!"'- Your list should return all letters as lower case and sorted. So for example if the input is
days are here again! 'your function should return the list ['a''d','e','g','h','i','n','p','r','s','y'l
Нарру
In [ ]:
1 # write your code here
2 # you may add more cells as needed

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