Revert import tables back to function

Author: rbenes

pandas/io/pytables.py

@@ -13,7 +13,6 @@
 import warnings
 
 import numpy as np
-from tables import __version__ as tables_version
 
 from pandas._config import config, get_option
 
@@ -4117,6 +4116,7 @@ def write(
         data_columns=None,
         track_times=True,
     ):
+        from tables import __version__ as tables_version
 
         if not append and self.is_exists:
             self._handle.remove_node(self.group, "table")

pandas/tests/io/pytables/test_store.py

@@ -300,10 +300,7 @@ def test_keys(self, setup_path):
 
     @pytest.mark.skipif(
         LooseVersion(tables.__version__) < LooseVersion("3.4.3"),
-        reason=(
-            "Skipping  pytables test when tables version is "
-            "lower than 3.4.3"
-        ),
+        reason=("Skipping  pytables test when tables version is lower than 3.4.3"),
     )
     def test_no_track_times(self, setup_path):