Make appose.SharedMemory and appose.NDArray work

So that these classes are in the same package (the base one)
as the Java codebase's equivalents.

And so that people don't need to know to import SharedMemory from
multiprocessing.shared_memory, which is kind of a keyboardful.

src/appose/__init__.py

@@ -134,6 +134,7 @@ def task_listener(event):
 from pathlib import Path
 
 from .environment import Builder, Environment
+from .types import NDArray, SharedMemory  # noqa: F401
 
 
 def base(directory: Path) -> Builder:

tests/test_shm.py

@@ -27,11 +27,8 @@
 # #L%
 ###
 
-from multiprocessing.shared_memory import SharedMemory
-
 import appose
 from appose.service import TaskStatus
-from appose.types import NDArray
 
 ndarray_inspect = """
 task.outputs["size"] = data.shm.size
@@ -45,11 +42,11 @@ def test_ndarray():
     env = appose.system()
     with env.python() as service:
         # Construct the data.
-        shm = SharedMemory(create=True, size=2 * 2 * 20 * 25)
+        shm = appose.SharedMemory(create=True, size=2 * 2 * 20 * 25)
         shm.buf[0] = 123
         shm.buf[456] = 78
         shm.buf[1999] = 210
-        data = NDArray("uint16", [2, 20, 25], shm)
+        data = appose.NDArray("uint16", [2, 20, 25], shm)
 
         # Run the task.
         task = service.task(ndarray_inspect, {"data": data})

tests/test_types.py

@@ -1,5 +1,4 @@
 import unittest
-from multiprocessing.shared_memory import SharedMemory
 
 import appose
 
@@ -66,7 +65,7 @@ def test_encode(self):
             "numbers": self.NUMBERS,
             "words": self.WORDS,
         }
-        ndarray = appose.types.NDArray("float32", [2, 20, 25])
+        ndarray = appose.NDArray("float32", [2, 20, 25])
         shm_name = ndarray.shm.name
         data["ndArray"] = ndarray
         json_str = appose.types.encode(data)
@@ -76,7 +75,7 @@ def test_encode(self):
         ndarray.shm.unlink()
 
     def test_decode(self):
-        shm = SharedMemory(create=True, size=4000)
+        shm = appose.SharedMemory(create=True, size=4000)
         shm_name = shm.name
         data = appose.types.decode(self.JSON.replace("SHM_NAME", shm_name))
         self.assertIsNotNone(data)