I want to enable the users can see each other's reviews and they can visit other's profile and also comment on the others' review. Could you please tell me how to modify the models and views? Thank you very much.

Great demo for Django.

I ran the demo and came across with an error: unsupported operand type(s) for /: 'map' and 'int' which is related to these two lines:

It is for calculating the avarage rating by using numpy. But numpy is not in favor of map. So a possible solution is to turn the map object to a list.

np.mean(list(all_ratings))

Just in case that anyone out there happened to meet with the problem.

Could you please describe where the review_set is defined? In the models.py file, under the wine table, you've used this, self.review_set

(wine) root@hal:~/Projects/Wine-Shop/wine/winerama# python3 manage.py migrate
SystemCheckError: System check identified some issues:

ERRORS:
reviews.Cluster.users: (fields.E300) Field defines a relation with model 'User', which is either not installed
, or is abstract.
reviews.Cluster.users: (fields.E307) The field reviews.Cluster.users was declared with a lazy reference to 're

views.user', but app 'reviews' doesn't provide model 'user'.
reviews.Cluster_users.user: (fields.E307) The field reviews.Cluster_users.user was declared with a lazy refere
nce to 'reviews.user', but app 'reviews' doesn't provide model 'user'.

@Vijeta141 please help.

TypeError at /reviews/recommendation/

'<' not supported between instances of 'method' and 'method'

then get a wine list including the previous IDs, order by rating

wine_list = sorted(list(Wine.objects.filter(id__in=other_users_reviews_wine_ids)),
    key=lambda x:x.average_rating,
    reverse=True

)

I set the LOGIN_REDIRECTORY as the tutorial says. But get an error saying that page not found : http://0.0.0.0:8000/accounts/login/reviws/review/user
Moreover, when I try to go the reviews page, an error occurs one more time:
NoReverseMatch at /reviews/
Reverse for 'user_reviews_list' with arguments '('lcc',)' and keyword arguments '{}' not found. 0 pattern(s) tried: []

When I am executing users_df.apply(save_user_from_row,axis=1)
getting the below error
IntegrityError: ('UNIQUE constraint failed: auth_user.username', u'occurred at index 0')

In your section titled "Adding Web Views", you go from defining the views in reviews/views.py to talking about templates and giving sample code for the reviews_list view template. There is no mention of where this code goes and where this file exists. I can follow through what the code means, but have no idea where it lives or will leave. At this point, there is no templates folder nor file. It would be clearer if you gave more info as to where this code goes and where that file lives:

<h2>Latest reviews</h2>

{% if latest_review_list %}
<div>
    {% for review in latest_review_list %}
    <div>
        <h4><a href="{% url 'reviews:review_detail' review.id %}">
        {{ review.wine.name }}
        </a></h4>
        <h6>rated {{ review.rating }} of 5 by {{ review.user_name }}</h6>
        <p>{{ review.comment }}</p>
    </div>
    {% endfor %}
</div>
{% else %}
<p>No reviews are available.</p>
{% endif %} 

Because of this lack of clarity, the tutorial from here onwards just becomes confusing. And when I check out stage-0.3 I look around the files to see where it might exist, and I find it in some templates folder along with some 3 other templates which are never mentioned in the tutorial or how the come about. I know it might simplistic of me to ask this, but that's the part I gave up. Tried it a few times and still could not reproduce your work other than just copying and pasting, which is useless.

Everything is working at stage, except i get an error on recommendation page.
Line causing the error :
user_cluster_name =
User.objects.get(username=request.user.username).cluster_set.first().name

'NoneType' object has no attribute 'name'

Request Method: GET
Request URL: http://192.168.99.100:8000/reviews/recommendation/
Django Version: 1.11
Exception Type: AttributeError
Exception Value:
'NoneType' object has no attribute 'name'
Exception Location: /code/reviews/views.py in user_recommendation_list, line 92
Python Executable: /opt/conda/bin/python
Python Version: 3.6.0