CLN: Remove sentinel_factory() in favor of object() (pandas-dev#25074)

Author: jschendel

pandas/core/common.py

@@ -401,13 +401,6 @@ def standardize_mapping(into):
     return into
 
 
-def sentinel_factory():
-    class Sentinel(object):
-        pass
-
-    return Sentinel()
-
-
 def random_state(state=None):
     """
     Helper function for processing random_state arguments.

pandas/io/formats/html.py

@@ -12,7 +12,6 @@
 from pandas.core.dtypes.generic import ABCMultiIndex
 
 from pandas import compat
-import pandas.core.common as com
 from pandas.core.config import get_option
 
 from pandas.io.common import _is_url
@@ -190,7 +189,7 @@ def _write_col_header(self, indent):
 
             if self.fmt.sparsify:
                 # GH3547
-                sentinel = com.sentinel_factory()
+                sentinel = object()
             else:
                 sentinel = False
             levels = self.columns.format(sparsify=sentinel, adjoin=False,
@@ -386,7 +385,7 @@ def _write_hierarchical_rows(self, fmt_values, indent):
 
         if self.fmt.sparsify:
             # GH3547
-            sentinel = com.sentinel_factory()
+            sentinel = object()
             levels = frame.index.format(sparsify=sentinel, adjoin=False,
                                         names=False)
 

pandas/io/formats/style.py

@@ -1322,7 +1322,7 @@ def _get_level_lengths(index, hidden_elements=None):
 
     Result is a dictionary of (level, inital_position): span
     """
-    sentinel = com.sentinel_factory()
+    sentinel = object()
     levels = index.format(sparsify=sentinel, adjoin=False, names=False)
 
     if hidden_elements is None: