Library Setup

urls.py - /path/projectdir/theapp

path('lib-test', views.lib_test, name='lib_test'),

lib.py - /path/projectdir/theproject

def lib_test(self):
    from theproject import lib_test
    return HttpResponse(lib_test.test('123'))

views.py - /path/projectdir/theapp

def test(x):
    return 'Working ' + x