- Use parfor to take care of the parallel part.

- Use sha1 hash because it's consistent between processes.

tests/test_multiple.py

@@ -1,16 +1,17 @@
+from contextlib import ExitStack
+from itertools import product
+
 import numpy as np
 from tiffwrite import IJTiffFile
-from itertools import product
-from contextlib import ExitStack
 from tqdm.auto import tqdm
 
 
 def test_mult(tmp_path):
-    shape = (3, 5, 12)
-    paths = [tmp_path / f'test{i}.tif' for i in range(8)]
+    shape = (2, 3, 5)
+    paths = [tmp_path / f'test{i}.tif' for i in range(6)]
     with ExitStack() as stack:
         tifs = [stack.enter_context(IJTiffFile(path, shape)) for path in paths]
         for c, z, t in tqdm(product(range(shape[0]), range(shape[1]), range(shape[2])), total=np.prod(shape)):
             for tif in tifs:
-                tif.save(np.random.randint(0, 255, (1024, 1024)), c, z, t)
+                tif.save(np.random.randint(0, 255, (64, 64)), c, z, t)
     assert all([path.exists() for path in paths])

tests/test_single.py

@@ -1,6 +1,7 @@
+from itertools import product
+
 import numpy as np
 from tiffwrite import IJTiffFile
-from itertools import product
 
 
 def test_single(tmp_path):