Reference library

Dictionaries & sets

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

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Dictionaries & sets easy

How to Validate Text and Count Words in Python

Count word frequencies, find unique and repeated words in a text using Python dictionaries and sets for beginner text validation.

dictionaries sets text-processing
Python 
def validate_text(text):
    words = text.lower().split()
    
    word_counts = {}
    for word in words:
        cleaned = word.strip('.,!?;:"\'')
        if cleaned:
            word_counts[cleaned] = word_counts.get(cleaned, 0) + 1
    
    unique_words = set(word_counts.keys())
    repeated_words = {word for word…
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