python - Nested list django -

assuiming

i have 1 many model this:

class user(models.model):      username = models.charfield(max_length=255)  class usercomment(models.model):      user = models.foreignkey(user)      text = models.charfield(max_length=255) 

how can make queryset in django view in order have list following?

user_comments= [[username1, [text1, text2, text3]], [username2, [text1, text2]]] 

----update----

i ended using modified version of sander van leeuwen solution

views.py

user_comments = {} user_comments = comments.objects.select_related('envia') comments_by_user = collections.defaultdict(list) comment in user_comments:   comments_by_user[comment.envia.id].append([comment.envia.first_name+" "+comment.envia.last_name,comment.text,comment.date.strftime('%d/%m/%y')]) comments_by_user.default_factory = none 

template.html

{% key, values in comments_by_user.items %} <ul class="chat-history" id="{{key}}-hist">     {% val in values%}          <li class="opponent unread">         {% v in val %}             {%if forloop.counter = 1 %}             <span class="user">{{v}}</span>             {% elif forloop.counter = 2 %}             <p>{{v}}</p>             {% elif forloop.counter = 3 %}             <span class="time">{{v}}</span>             {%endif%}         {% endfor %}         </li>     {% endfor %} </ul> {% endfor %} 

is there reason want nested lists?

a dict easier deal with. example:

user_comments = usercomment.objects.select_related('user') comments_by_user = defaultdict(list) comment in users_comments:     comments_by_user[comment.user.username].append(comment.text) 

this output:

{'username1': ['comment', 'comment', ...], 'username2': ['comment', 'comment']} 

if want nested lists can do:

comments_list = [[username, comments] username, comments in comments_by_user.items()]