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I am trying to implement a python function that returns a Flesch-Kincaid readability test of a text by using this formula from this wiki: Flesch reading-ease test

I also came across a question with the same objective as I do that was answered: Converting Readability formula into python function

So by using this as a sort of guide I took a similar approach with my implementation and ended with this as my code:

import nltk
import collections
nltk.download('punkt')
nltk.download('gutenberg')
nltk.download('brown')

# DO NOT MODIFY THE CODE BELOW #
import re
VC = re.compile('[aeiou]+[^aeiou]+', re.I)
def count_syllables(word):
    return len(VC.findall(word))

def compute_fres(text):
    """Return the FRES of a text.
    >>> emma = nltk.corpus.gutenberg.raw('austen-emma.txt')
    >>> compute_fres(emma) # doctest: +ELLIPSIS
    99.40...
    """

    tToken = nltk.word_tokenize(text)

    for f in nltk.corpus.gutenberg.fileids():
        nsents = len(nltk.corpus.gutenberg.sents(f))
        nwords = len(nltk.corpus.gutenberg.words(f))
        nsyllables = sum(count_syllables(w) for w in words)
        fres = 206.835 - 1.015 * (nwords / nsents) - 84.6 * (nsyllables / nwords)
    return len(fres.findall(tToken))

I then ran the my code and got this error message:

Error
**********************************************************************
File "C:/Users/WORLD/PycharmProjects/a1/a1.py", line 54, in a1.compute_fres
Failed example:
    compute_fres(emma) # doctest: +ELLIPSIS
Exception raised:
    Traceback (most recent call last):
      File "C:\Program Files\JetBrains\PyCharm Community Edition 2017.3.4\helpers\pycharm\docrunner.py", line 140, in __run
        compileflags, 1), test.globs)
      File "<doctest a1.compute_fres[1]>", line 1, in <module>
        compute_fres(emma) # doctest: +ELLIPSIS
      File "C:/Users/WORLD/PycharmProjects/a1/a1.py", line 63, in compute_fres
        nsyllables = sum(count_syllables(w) for w in words)
    NameError: name 'words' is not defined

Like the other user's post, my goal is to pass the doctest by implementing the correct function. I can also assume that he/she is in the same programming class as me.

I'm a bit newby to python so I'm not sure what I'm doing wrong.

LearningToProgram
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  • It's not really going to help if you keep creating new questions on the same problem with the same account or a different one ;P (Dupe of https://stackoverflow.com/users/7087895/ovaflow) – alvas Mar 15 '18 at 09:12
  • Or maybe it's really another person, doing the same homework? – alvas Mar 15 '18 at 09:15
  • 1, Namespaces are good, use them (we're not Java). Instead of `import nltk; nltk.corpus.gutenberg.words()`, do this `from nltk.corpus import gutenberg; gutenberg.words()` – alvas Mar 15 '18 at 09:16
  • 2. This line here `sum(count_syllables(w) for w in words)`, do you understand what it's doing? If not, a look at list comprehension, https://github.com/usaarhat/pywarmups/blob/master/session2.md – alvas Mar 15 '18 at 09:19
  • 3. Why was `tToken` created but not used? – alvas Mar 15 '18 at 09:19
  • 4. (not crucial) but BTW, do you know what's `f` in `for f in nltk.corpus.gutenberg.fileids():`? Explicit is better than implicit (esp. when it comes to naming variables). – alvas Mar 15 '18 at 09:20
  • 5. Do you know the type of `fres`? If not, try to `print(type(fres))` after the `fres = 206.835 - ... ` line. Take a look at https://github.com/usaarhat/pywarmups/blob/master/session1.md if you don't know what `type()` does. – alvas Mar 15 '18 at 09:22
  • 6. Do you know what `len(fres.findall(tToken))` is trying to do? Do you know where does the `.findall()` come from? And what does `len()` do? – alvas Mar 15 '18 at 09:23
  • Hope the questions above helps! Have fun with the `homework`? – alvas Mar 15 '18 at 09:23
  • @alvas Thank you for your comments, I did more research into the things you pointed out and they really helped alot. And also I don;t blame you if you thought I was the same guy that posted the similar question before I found it and linked it to mine. But again thank you for your advice, it's bit different going from java to python though – LearningToProgram Mar 15 '18 at 11:36

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