diff --git a/README.md b/README.md
index f741d61c0bc84837226d3cf138e071b51d8d4140..4530b63bc667931fd6c8f05483d994b45f4b9d35 100644
--- a/README.md
+++ b/README.md
@@ -64,12 +64,21 @@ source ./venv/bin/activate
 python -m pip install -e .
 ```
 
-6. Creat documentation:
+6. Create documentation:
 ```
 acc-py init-docs
 ```
 
-7. Release product:
+7. Check code style using `black`:
+```
+python -m pip install black
+black --diff .  # To see what `black` is proposing to do to your source code
+black .         # To let `black` edit the source code
+```
+
+8. Release product:
+See acc-py documentation on [wikis](https://wikis.cern.ch/display/ACCPY/Development+HowTo%27s)
+
 ```
 acc-py devrelease
 ```
diff --git a/datascout/__init__.py b/datascout/__init__.py
index 442097aea1c9c412686b3eae228b657c138c2fed..89d64b6d9e1501bb796605eecbb838fe41627435 100644
--- a/datascout/__init__.py
+++ b/datascout/__init__.py
@@ -41,3 +41,6 @@ from ._datascout import parquet_to_awkward
 # other hidden functions that could be useful for debug
 from ._datascout import _find_lists
 from ._datascout import _compare_data
+
+# saving
+from ._datascout import save_dict
diff --git a/datascout/_datascout.py b/datascout/_datascout.py
index af28cae49e13d528220d4b05ff96f3e12548538d..5e479e351905e462390dd5911d8af6eb72e8df76 100644
--- a/datascout/_datascout.py
+++ b/datascout/_datascout.py
@@ -348,7 +348,7 @@ def json_to_pandas(filename):
     """
     Function provided for convenience, but not of interest for typical use case...
     """
-    return df.read_json(filename)
+    return pd.read_json(filename)
 
 
 def pandas_to_dict(input_pandas):
@@ -402,14 +402,9 @@ def parquet_to_awkward(filename):
 
 ####### Simple save/load functions for the user
 
-
-def _getFilename():
-    return datetime.now().strftime("%Y.%m.%d.%H.%M.%S.%f")
-
-
 def save_dict(dictData, folderPath=None, filename=None, fileFormat="parquet"):
     if filename == None:
-        filename = _getFilename()
+        filename = datetime.now().strftime("%Y.%m.%d.%H.%M.%S.%f")
     Path(folderPath).mkdir(parents=True, exist_ok=True)
     filename = os.path.join(folderPath, filename)
     if fileFormat == "parquet":