WIP: DataFrame support

requirements.txt

@@ -1,2 +1,3 @@
 numpy
 fasteners
+pandas

zarr/codecs.py

@@ -6,7 +6,7 @@
 import math
 import multiprocessing
 import atexit
-
+import pickle
 
 import numpy as np
 
@@ -910,6 +910,30 @@ def __repr__(self):
 
 codec_registry[Categorize.codec_id] = Categorize
 
+class PickleCodec(Codec):
+
+    codec_id = 'x-pickle'
+
+    def encode(self, buf):
+        return pickle.dumps(buf)
+
+    def decode(self, buf, out=None):
+        dec = pickle.loads(buf)
+        if out is not None:
+            np.copyto(out, dec)
+            return out
+        else:
+            return dec
+
+    def get_config(self):
+        return dict(id=self.codec_id)
+
+    def __repr__(self):
+        return 'PickleCodec()'
+
+
+codec_registry[PickleCodec.codec_id] = PickleCodec
+
 
 __all__ = ['get_codec', 'codec_registry']
 for _cls in codec_registry.values():