feat: add configurable factories for pickle and json byte wrapping

dol/__init__.py

@@ -113,6 +113,7 @@ def ihead(store, n=1):
     chain_get,  # a function to perform chained get operations (i.e. path keys get)
     written_bytes,  # transform a file-writing function into a bytes-writing function
     written_key,  # writes an object to a key and returns the key.
+    read_from_bytes,  # transform a file-reading function into a bytes-reading function
 )
 
 from dol.trans import (

dol/filesys.py

@@ -567,6 +567,22 @@ class TextFiles(FileStringPersister):
 json_bytes_wrap = wrap_kvs(obj_of_data=json.loads, data_of_obj=json.dumps)
 
 
+# And two factories to make the above more configurable:
+def mk_pickle_bytes_wrap(*, loads_kwargs: dict, dumps_kwargs: dict) -> Callable:
+    """"""
+    return wrap_kvs(
+        obj_of_data=partial(pickle.loads, **loads_kwargs),
+        data_of_obj=partial(pickle.dumps, **dumps_kwargs),
+    )
+
+
+def mk_json_bytes_wrap(*, loads_kwargs: dict, dumps_kwargs: dict) -> Callable:
+    return wrap_kvs(
+        obj_of_data=partial(json.loads, **loads_kwargs),
+        data_of_obj=partial(json.dumps, **dumps_kwargs),
+    )
+
+
 @pickle_bytes_wrap
 class PickleFiles(Files):
     """A store of pickles"""