Update test_computer_placement.py

tests/0.D/test_computer_placement.py

 import random
 import pytest
-from src.computer_placement import choose_orientation_and_location, generate_ship_coordinates, place_ship, is_conflict, place_ships
+from src.computer_placement import choose_orientation_and_location, generate_ship_coordinates, is_conflict, place_ships
 from tests.helpers.conflicts_test_data import conflicts
 from tests.helpers.naming import apply_names
 
@@ -35,7 +35,8 @@ def test_choose_orientation_and_location(size, seed):
 
     trues = ors.count(True)
     falses = ors.count(False)
-    assert 1500 > abs(trues - falses), 'the orientations should be approximately uniformly random'
+    assert 1500 > abs(
+        trues - falses), 'the orientations should be approximately uniformly random'
 
     for orientation, location in zip(ors, locs):
         if size <= 0:
@@ -44,11 +45,10 @@ def test_choose_orientation_and_location(size, seed):
             assert None is location, 'there is no location to place the ship at for size > ' + \
                 str(BOARD_SIZE) + '; so, you should return None'
         else:
-            try:
-                x, y = location
-            except TypeError:
-                raise AssertionError(
-                    'the return value of choose_orientation_and_location should always be a tuple')
+            assert location is not None and len(
+                location) == 2, 'the return value of choose_orientation_and_location should always be a tuple of size 2'
+
+            x, y = location
             assert 0 <= x <= 7 and 0 <= y <= 7, 'all coordinates must be between 0 and 7; you returned ' + \
                 str((x, y))