Reference library

Dictionaries & sets

Key–value maps, uniqueness, counting, grouping, and fast lookups.

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Dictionaries & sets easy

How to count words and find unique words in Python

Build a beginner-friendly text processor that counts word frequencies, finds unique words, and identifies words with vowels using dictionaries and sets.

dictionary set text-processing
Python 
def text_processor(text):
    words = text.lower().replace(",", "").replace(".", "").split()
    word_count = {}
    
    for word in words:
        word_count[word] = word_count.get(word, 0) + 1
    
    unique_words = set(words)
    vowels = set("aeiou")
    words_with_vowels = {word for word in unique_words if vowe…
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Dictionaries & sets — Python code examples

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