Find Data From a String in Python: Stats, Clean, Keywords

def get_text_stats(text):
    """Return basic statistics about a string."""
    words = text.split()
    sentences = text.replace('!', '.').replace('?', '.').split('.')
    sentences = [s for s in sentences if s.strip()]
    return {
        'characters': len(text),
        'words': len(words),
        'sentences': len(sentences),
        'average_word_length': round(sum(len(w) for w in words) / len(words), 2) if words else 0,
    }

def clean_text(text):
    """Remove extra whitespace and normalize case."""
    return ' '.join(text.split()).lower()

def extract_keywords(text, min_length=4):
    """Return unique words longer than min_length, sorted alphabetically."""
    words = text.lower().split()
    keywords = {word.strip('.,!?;:') for word in words if len(word.strip('.,!?;:')) >= min_length}
    return sorted(keywords)

if __name__ == "__main__":
    sample = "  Python is fun! It's powerful and easy to learn. Python helps beginners.  "
    print("Original:", repr(sample))
    print("Stats:", get_text_stats(sample))
    print("Cleaned:", clean_text(sample))
    print("Keywords:", extract_keywords(sample))