Here are some options if you can't find anything in django:
```
>>> a = [1,2,3]
>>> b = (4,5)
>>> import itertools
>>> c = itertools.chain(a, b)
>>> list(c)
[1, 2, 3, 4, 5]
>>> import operator
>>> operator.concat(a, a.__class__(b))
[1, 2, 3, 4, 5]
>>> operator.concat(b, b.__class__(a))
(4, 5, 1, 2, 3)
>>> operator.concat(a, a.__class__(a))
[1, 2, 3, 1, 2, 3]
>>> operator.concat(b, b.__class__(b))
(4, 5, 4, 5)
>>> a + a.__class__(b)
[1, 2, 3, 4, 5]
>>> b + b.__class__(a)
(4, 5, 1, 2, 3)
>>> b += b.__class__(a)
>>> b
(4, 5, 1, 2, 3)
>>> a += a.__class__(b)
>>> a
[1, 2, 3, 4, 5, 1, 2, 3]