Letter Frequency Counting

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Your question is Letter Frequency Counting. Start with the requirements on the right.

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Problem

Write a program to count how many times each letter repeats, then display each letter with its count in alphabetical order. Treat uppercase and lowercase letters as the same, and ignore non-letter characters. Implement def count_letters(text):; accept a string and return a list of [letter, count] pairs containing only letters that occur, ordered alphabetically.

Constraints

0 <= len(text) <= 1000
The input may contain uppercase letters, lowercase letters, digits, spaces, and punctuation
Only alphabetic characters are included in the result
Letter matching is case-insensitive
Return letters in alphabetical order

Function Signature

def count_letters(text):

Your solutionPython 3

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