CLN: remove config._get_option_fast. get_option faster now GH5147

Author: y-p

pandas/core/config.py

@@ -532,15 +532,6 @@ def _get_root(key):
     return cursor, path[-1]
 
 
-def _get_option_fast(key):
-    """ internal quick access routine, no error checking """
-    path = key.split('.')
-    cursor = _global_config
-    for p in path:
-        cursor = cursor[p]
-    return cursor
-
-
 def _is_deprecated(key):
     """ Returns True if the given option has been deprecated """
 

pandas/core/generic.py

@@ -1018,7 +1018,7 @@ def _setitem_copy(self, copy):
     def _check_setitem_copy(self):
         """ validate if we are doing a settitem on a chained copy """
         if self._is_copy:
-            value = config._get_option_fast('mode.chained_assignment')
+            value = config.get_option('mode.chained_assignment')
 
             t = ("A value is trying to be set on a copy of a slice from a "
                  "DataFrame.\nTry using .loc[row_index,col_indexer] = value "