FIX: add init files

Author: kx79wq

histogrammar/notebooks/__init__.py

@@ -20,20 +20,18 @@
 
 # Resources lookup file for histogrammar
 from importlib import resources
-import histogrammar.test_data
-import histogrammar.notebooks
 
 
 # data files that are shipped with histogrammar.
 _DATA = {
     _.name: _
-    for _ in resources.files(histogrammar.test_data).iterdir()
+    for _ in resources.files("histogrammar.test_data").iterdir()
 }
 
 # Tutorial notebooks
 _NOTEBOOK = {
     p.name: p
-    for p in resources.files(histogrammar.notebooks).iterdir() if p.suffix == ".ipynb"
+    for p in resources.files("histogrammar.notebooks").iterdir() if p.suffix == ".ipynb"
 }
 
 # Resource types