Concatenate lists in JINJA2

jinja2, python

Solution

AFAIK you can't do it using native Jinja2 templating. You're better off creating a new combined iterable and passing that to your template, eg:

from itertools import chain

x = xrange(3)
y = xrange(3, 7)
z = chain(x, y) # pass this to your template
for i in z:
    print i

As per comments, you can explicitly convert the iterables into lists, and concatenate those:

{% for M in GRP1|list + GRP2|list %}

Problem

How can I concatenate two list variables in jinja2? E.G. ``` GRP1 = [1, 2, 3] GRP2 = [4, 5, 6] {# This works fine: #} {% for M in GRP1 %} Value is {{M}} {% endfor %} {# But this does not: #} {% for M in GRP1 + GRP2 %} Value is {{M}} {% endfor %} ``` So, I have tried to concatenate the two lists using + (like you would in Python), but it turns out that they are not lists, but python `xrange` objects: ``` jijna2 error: unsupported operand type(s) for +: 'xrange' and 'xrange' ``` Is there a way for me to iterate over the concatenation of GRP1 and GRP2 in the same for loop?

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