Iterating over nested list

Question

I have a list with a nested list returned from my view, something like -

[[1, [1, 2, 3]], [2, [2, 3, 4]], [3, [3,4,5]]]

I want something like this, which would work in python -

for obj in my_list: for nested_obj in obj[1]: print nested_obj

But with the django template system, if I try -

{% for obj in data_list %} <h2>{{obj.0}}</h2> <p> {{for nested_obj in obj.1}} <h5>{{nested_obj}}</h5> {{ endfor }} </p> {% endfor %}

I get -

Could not parse the remainder: ' nested_obj in obj.1' from 'for nested_obj in obj.1'

Why is this? Thanks!

Edit - So, that was stupid - I wrote {{for .... }} instead of {% for ... %} Thanks @allcaps

allcaps · Accepted Answer · 2014-03-23 08:37:12Z

{{ for x in ... }} is causing a TemplateSyntaxError and should be {% for x in ... %}.

python manage.py shell

from django.template import Template, Context data_list = [[1, [1, 2, 3]], [2, [2, 3, 4]], [3, [3, 4, 5]]] template = """ {% for obj in data_list %} Obj {{obj.0}} {% for nested_obj in obj.1 %} Nested {{nested_obj}} {% endfor %} {% endfor %} """ t = Template(template) c = Context({"data_list": data_list}) print t.render(c)

Out:

 Obj 1 Nested 1 Nested 2 Nested 3 Obj 2 Nested 2 Nested 3 Nested 4 Obj 3 Nested 3 Nested 4 Nested 5

Mihai Zamfir · Accepted Answer · 2014-03-23 08:05:37Z

0

Maybe this is working...

data_list = [[1, [1, 2, 3]], [2, [2, 3, 4]], [3, [3,4,5]]] {% for header, remainder in data_list %} <h2>a</h2> <p> {{ for x in remainder }} <h5>{{ x }}</h5> {{ endfor }} </p> {% endfor %}

answered Mar 23, 2014 at 8:05

Mihai Zamfir

2,1665 gold badges24 silver badges37 bronze badges

4 Comments

allcaps Over a year ago

TemplateSyntaxError: Could not parse the remainder: ' x in remainder' from 'for x in remainder'

Mihai Zamfir Over a year ago

THen, how do you send the data_list to your template? are you sure it is in the form of a data_list ?

allcaps Over a year ago

{{ for x in ... }} is causing a TemplateSyntaxError. {% for x in ... %} does not.

Mihai Zamfir Over a year ago

oh, geez, of course. Didn't notice that you were'nt using the '{% %}' syntax

Collectives™ on Stack Overflow

Iterating over nested list

2 Answers 2

Comments

4 Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

4 Comments

Related