Add data handler module

setup.py

@@ -16,7 +16,7 @@ VERSION = '0.0.1'
 
 # What packages are required for this module to be executed?
 REQUIRED = [
-    'attrs'
+    'attrs', 'numpy', 'asapo_consumer', 'asapo_producer', 'scikit-image'
 ]
 
 # What packages are optional?

src/AsapoWorker/data_handler.py

+import io
+import numpy as np
+from skimage.io import imread
+
+
+def get_image(data, metadata):
+    typ = metadata["name"].rpartition(".")[-1]
+    if typ == "tif":
+        buf = io.BytesIO(data)
+        image = imread(buf)
+    elif typ == "numpy":
+        shape = metadata["meta"]["shape"]
+        dtype = metadata["meta"]["dtype"]
+        image = np.frombuffer(data, dtype=dtype).reshape(shape)
+    else:
+        raise ValueError("Unknown extension: " + typ)
+    return image
+
+
+def get_filename_parts(metadata):
+    name = metadata["name"]
+    base, sep, index_and_ext = name.rpartition("-")
+    index, ext = index_and_ext.split(".")
+    return base, int(index), ext