Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Language is python 3

1. Count Letters Problem Write a function named count_letters that counts the letters in its parameter named s. It returns a dictionary containing pairs in which the key is a letter and the values of a key is the number of times the letter appears in s. Sample >> print(sorted (count_letters('brontosaurus').items())) [('a', 1), ('b', 1), ('n', 1), ('o', 2), ('r', 2), ('s', 2), ('t', 1), ('u', 2)] >>> print(sorted (count_letters('Hello World!').items())) [(' ', 1), ('!', 1), ('d', 1), ('e', 1), ('h', 1), ('l', 3), ('o', 2), ('r', 1), ('w', 1)]
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Transcribed Image Text:1. Count Letters Problem Write a function named count_letters that counts the letters in its parameter named s. It returns a dictionary containing pairs in which the key is a letter and the values of a key is the number of times the letter appears in s. Sample >> print(sorted (count_letters('brontosaurus').items())) [('a', 1), ('b', 1), ('n', 1), ('o', 2), ('r', 2), ('s', 2), ('t', 1), ('u', 2)] >>> print(sorted (count_letters('Hello World!').items())) [(' ', 1), ('!', 1), ('d', 1), ('e', 1), ('h', 1), ('l', 3), ('o', 2), ('r', 1), ('w', 1)]
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