readability-python/readability.py at master · alishahwee/readability-python · GitHub

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from cs50 import get_string


def main():
    text = get_string("Text: ")  # Ask user for a piece of text
    letters = count_letters(text)
    words = count_words(text)
    sentences = count_sentences(text)
    CL_Index(letters, words, sentences)  # ColemanLiauIndex calculation


def count_letters(text):
    count = 0
    for i in text:
        if str.isalpha(i) == True:
            count += 1
    return count


def count_words(text):
    count = 1  # One because of the last word (assumes no space at the end)
    for i in text:
        if str.isspace(i) == True:
            count += 1
    return count


def count_sentences(text):
    count = 0
    for i in text:
        if ord(i) == 33:  # If text has "!"
            count += 1
        elif ord(i) == 46:  # If text has "."
            count += 1
        elif ord(i) == 63:  # If text has "?"
            count += 1
    return count


def CL_Index(letters, words, sentences):
    L = letters / words * 100
    S = sentences / words * 100

    # CL_Index formula
    index = 0.0588 * L - 0.296 * S - 15.8

    if index < 1:
        return print("Before Grade 1")
    elif index >= 16:
        return print("Grade 16+")
    else:
        return print("Grade", round(index))


main()