django RequestFactory query param with multiple values

gistfile1.txt

In [3]: from django.test import RequestFactory

In [4]: rf = RequestFactory()

In [5]: req = rf.get('/foo', {'bar': ['baz', 'bat']})

In [6]: req   # this looks like expected:
Out[6]: <WSGIRequest: GET '/foo?bar=baz&bar=bat'>

In [7]: req.GET['bar']  # Why does this give me only one value?
Out[7]: u'bat'

Why does this give me only one value?

Django took that decision a long time ago; I'm not sure on the history of it.

You can use req.GET.getlist("bar") instead, to achieve the goal in [7].