Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Python Testing Be Assertive assertIn

thought get_anagram("treehouse"), "house") would work, but it doesn't

Trying to create a test using assertIn to make sure that "house" is in "treehouse", but this isn't working. Any help?

class AnagramTests(unittest.TestCase):
    def test_in_anagrams(self):
        self.assertIn(get_anagrams("treehouse"), "house")
import unittest

from string_fun import get_anagrams

class AnagramTests(unittest.TestCase):
    def test_in_anagrams(self):
        self.assertIn(get_anagrams("treehouse"), "house")
import itertools

def is_palindrome(yarn):
    """Return whether or not a string is a palindrome.

    A palindrome is a word/phrase that's the same in
    both directions.
    return yarn == yarn[::-1]

def get_anagrams(*yarn):
    """Return a list of anagrams for a string."""
    # If only one letter came in, return it
    if yarn:
        if len(yarn[0]) <= 1:
            return list(yarn)
        raise ValueError("Must provide at least two letters")

    # Get all of the words from the dictionary
    words = set([
        w.strip().lower() for w in open('words.txt')

    output = set()
    for thread in yarn:
        thread = thread.lower()
        # Find all possible anagrams
        for i in range(2, len(thread)):
            fibers = set(
                [''.join(w) for w in itertools.permutations(thread, i)]

    # Finally, return all of the combinations that are in the dictionary
    return sorted(list(output))

1 Answer

From the teacher's notes in this video

assertIn(x, y) - Make sure x is a member of y (this is like the in keyword)

So to make sure that "house" is in "treehouse" you would need to reverse what you have:

self.assertIn("house", get_anagrams("treehouse"))