Unit tests failed, .all() is apparently what you need to do on numpy …

…arrays,not all() the python function

python/tests/test_files.py

@@ -25,7 +25,7 @@ def test_memmap(self):
                 dtype=np.float32,
                 use_memmap=True
             )
-            self.assertTrue(all(expected == actual))
+            self.assertTrue((expected == actual).all())
             actual = dap.vectors_from_file(
                 vecs_file,
                 dtype=np.float32,