這可能是一個愚蠢的問題；也許我的過程完全錯誤（如果是，請指出），但是如何在自定義函數中提取三個遞增變量（c_char、c_word、c_sentence）并將其用于其他用途？def length_finder(x):    #variables counting character,word,sentnece      c_char = 0    c_word = 1    c_sentence = 0    for i in x:        if (i >= 'a' and i <= 'z') or (i >= 'A' and i <= 'Z'):            c_char += 1        if i == " ":            c_word += 1        if i == '.' or i == '!' or i == '?' :            c_sentence += 1length_finder(input("Enter the text you wish to analyze: "))L = 100/c_word*c_charS = 100/c_word*c_sentence#formula to get readabilityindex = 0.0588 * L - 0.296 * S - 15.8print("This text is suitable for grade " + str(index))