diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..25b25bc07
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,10 @@
+{
+    "python.testing.pytestArgs": [
+        "tests"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.nosetestsEnabled": false,
+    "python.testing.pytestEnabled": true,
+    "python.linting.pylintEnabled": true,
+    "python.linting.enabled": true
+}
\ No newline at end of file
diff --git a/viewing_party/main.py b/viewing_party/main.py
index e69de29bb..9ed4804f9 100644
--- a/viewing_party/main.py
+++ b/viewing_party/main.py
@@ -0,0 +1,270 @@
+# test_wave_01
+
+def create_movie(movie_title=str, genre=str, rating=float):
+    """Creates a ``new_movie`` that will be added to the user's list.
+
+    Args:
+        movie_title (str): The title of a movie. Defaults to str.
+        genre (str): The movie genre. Defaults to str.
+        rating (float): The movie rating. Defaults to float.
+
+    Returns:
+        new_movie: A dictionary containing the keys and values
+            for a movie. Returns None for invalid arguments.
+    """
+
+    new_movie = {
+        "title": movie_title,
+        "genre": genre,
+        "rating": rating
+    }
+
+    if not movie_title or not genre or not rating:
+        return None
+    else:
+        return new_movie
+
+def add_to_watched(user_data, movie):
+    """Adds a ``movie`` to the user's ``watched`` movies list.
+
+    Args:
+        user_data (dict): Represents the user's ``watched`` list.
+        movie (dict): Represents a movie with a ``title``, ``genre``,
+            and ``rating``.
+
+    Returns:
+        user_data (dict): The user's data, with their ``watched``
+            movies list updated.
+    """
+
+    if movie not in user_data["watched"]:
+        user_data["watched"].append(movie)
+    return user_data
+
+def add_to_watchlist(user_data, movie):
+    """Adds the ``movie`` to the user's ``watchlist``.
+
+    Args:
+        user_data (dict): Represents the user's ``watchlist``.
+        movie (dict): Represents a movie with a ``title``, ``genre``,
+            and ``rating``.
+
+    Returns:
+        user_data (dict): The user's data, with their ``watchlist``
+            updated.
+    """
+
+    if movie not in user_data["watchlist"]:
+        user_data["watchlist"].append(movie)
+    return user_data
+
+def watch_movie(user_data, title):
+    """Allows the user to update their movies lists based
+    on a ``title`` they have watched.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            lists of movies.
+        title (str): Represents the ``title`` of the movie
+            the user has watched.
+
+    Returns:
+        user_data (dict): The user's data, with their lists 
+            of movies updated.
+    """
+
+    for entry in user_data["watchlist"]:
+        if entry["title"] == title:
+            user_data["watchlist"].remove(entry)
+            add_to_watched(user_data, entry)
+    return user_data
+
+# test_wave_02
+
+def get_watched_avg_rating(user_data):
+    """Calculates the average rating of all movies in the user's ``watched`` movies list.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            list of ``watched`` movies, rated.
+
+    Returns:
+        float: The average rating of all movies in the user's
+            ``watched`` movies list. Unrated movies default to 0.0.
+    """
+
+    user_movies = user_data["watched"]
+    movies_list_length = len(user_movies)
+    default_rating = 0.0
+    avg_rating = 0.0
+
+    if movies_list_length == 0:
+        return None
+        
+   for movie in user_movies:
+        avg_rating += movie["rating"]
+    return avg_rating / float(movies_list_length)
+
+def get_most_watched_genre(user_data):
+    """Determines which genre is most frequent in the user's
+    ``watched`` list.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            ``watched`` list of movies.
+
+    Returns:
+        popular_genre (str): The movie genre that is the most
+            frequently watched.
+    """
+
+    all_genres = {}
+    popular_genre = None
+    pop_val = 0
+
+    for movie in user_data["watched"]:
+        genre = movie["genre"]  # for better readability
+        if genre not in all_genres:
+            all_genres[genre] = 1
+        else:
+            all_genres[genre] += 1  # update the value
+
+    for gen in all_genres:
+        if all_genres[gen] > pop_val:
+            pop_val = all_genres[gen]
+            popular_genre = gen
+    return popular_genre
+
+# test_wave_03
+
+# NEW: Helper function: gets the movies all friends watched.
+
+def get_friends_movies(user_data):
+    """A helper function to get a list of movies the user's friends have watched.
+
+    Args:
+        user_data (dict): Represents the user's data, with their ``friends`` list.
+
+    Returns:
+        friends_movies (list): A list of dictionaries, representing movies the user's friends have watched. 
+    """
+
+    friends_movies = []
+    for friend in user_data["friends"]:
+        for movie in friend["watched"]:
+            if movie not in friends_movies:
+                friends_movies.append(movie)
+    return friends_movies
+
+def get_unique_watched(user_data):
+    """Determines which movies the user has watched, but none of their friends
+    have watched.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            ``watched`` list of movies and ``friends`` list.
+
+    Returns:
+        user_unique_movies (list): a list of dictionaries, that 
+            represents a list of movies.
+    """
+
+    friends_movies = get_friends_movies(user_data)
+    user_unique_movies = []
+
+    for movie in user_data["watched"]:
+        if movie not in user_unique_movies and movie not in friends_movies:
+            user_unique_movies.append(movie)
+    return user_unique_movies
+
+def get_friends_unique_watched(user_data):
+    """Determines which movies at least one of the user's friends have watched, but the user has not watched.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            ``watched`` list of movies and ``friends`` list.
+
+    Returns:
+        user_must_see (list): A list of dictionaries, that 
+        represents a list of movies.
+    """
+
+    friends_movies = get_friends_movies(user_data)
+    user_must_see = []
+
+    for movie in friends_movies:
+        if movie not in user_data["watched"] and movie not in user_must_see:
+                user_must_see.append(movie)
+    return user_must_see
+
+# test_wave_04
+
+def get_available_recs(user_data):
+    """Determines a list of movie recommendations based in movies that the user didn't watch and their ``subscriptions`` in streaming services.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            ``watched`` list of movies, a ``friends`` list, and 
+            their ``subscriptions``.
+
+    Returns:
+        recommendations (list): A list of movies recommended by 
+            friends.
+    """
+
+    subscriptions = user_data["subscriptions"]
+    friends_movies = get_friends_movies(user_data)
+    recommendations = []
+
+    for movie in friends_movies:
+        if movie["host"] in subscriptions and movie not in recommendations:
+            recommendations.append(movie)
+    return recommendations
+
+# test_wave_05
+
+def get_new_rec_by_genre(user_data):
+    """Determines a list of recommended movies considering the user's most frequently watched movie ``genre``.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            list of movies, favorite movie genre, and a ``friends``
+            list.
+
+    Returns:
+        new_recs (list): A list of recommended movies based in
+            the user's favorite genre.
+    """
+
+    friends_movies = get_friends_movies(user_data)
+    fav_genre = get_most_watched_genre(user_data)
+    new_recs = []
+
+    for movie in friends_movies:
+            if movie not in new_recs and movie["genre"] == fav_genre:
+                new_recs.append(movie)
+    return new_recs
+
+def get_rec_from_favorites(user_data):
+    """Determines a list of recommended movies considering the user's favorite movies.
+
+    Args:
+        user_data (dict): Represents the user's data, with their
+            list of movies, favorite movies, and a ``friends``
+            list.
+
+    Returns:
+        recommendations (list): A list of recommended movies based
+            in the user's favorite movies.
+    """
+
+    friends_movies = get_friends_movies(user_data)
+    recommendations = []
+
+    for movie in user_data["favorites"]:
+        recommendations.append(movie)
+
+    for movie in friends_movies:
+        if movie in recommendations:
+            recommendations.remove(movie)
+    return recommendations