/Python/List of words from a string and filter them based on a secondary list

List of words from a string and filter them based on a secondary list

common_words = frozenset(("if", "but", "and", "the", "when", "use", "to", "for"))
title = "When to use Python for web applications"
title_words = set(title.lower().split())
keywords = title_words.difference(common_words)
print(keywords)

Source: stackoverflow.com

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