Design Hash Map for Counting

MediumPython

Problem

Design a hash map to count how many times a word appears in a text file.

Implement count_words(text), where text is the file contents as a string. Treat words as alphabetic sequences that may contain an internal apostrophe, ignore punctuation, and count words case-insensitively. Return a dictionary mapping each normalized word to its frequency.

Constraints

0 <= len(text) <= 5000
Words contain English letters and may contain one internal apostrophe.
Matching is case-insensitive.
Return an empty dictionary when no words are present.

Function Signature

def count_words(text):

CodePython 3

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