double check public namespaces

arviz/__init__.py

@@ -5,9 +5,6 @@
 import logging
 import os
 import re
-import warnings
-import datetime
-from pathlib import Path
 
 from matplotlib.colors import LinearSegmentedColormap
 from matplotlib.pyplot import style
@@ -23,6 +20,10 @@ def _warn_once_per_day():
     if len(pat.findall(info)) == 3:
         return
 
+    import warnings
+    import datetime
+    from pathlib import Path
+
     warning_dir = Path.home() / "arviz_data"
     warning_dir.mkdir(exist_ok=True)
 
@@ -372,4 +373,4 @@ def _mpl_cm(name, colorlist):
 
 
 # clean namespace
-del os, logging, LinearSegmentedColormap, Logger, mpl
+del os, re, logging, version, LinearSegmentedColormap, Logger, mpl

arviz/preview.py

@@ -55,4 +55,4 @@
 info += _status + "\n"
 
 # clean namespace
-del logging, _status
+del logging, _status, _log