document changes to cline options

Author: edbennett

doc/source/whatsnew/v3.0.0.rst

@@ -62,6 +62,7 @@ Other enhancements
 - Support passing a :class:`Iterable[Hashable]` input to :meth:`DataFrame.drop_duplicates` (:issue:`59237`)
 - Support reading Stata 102-format (Stata 1) dta files (:issue:`58978`)
 - Support reading Stata 110-format (Stata 7) dta files (:issue:`47176`)
+- :meth:`Styler.to_latex` accepts additional options to the ``clines`` parameter, allowing lines to be drawn between hidden index levels.
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.notable_bug_fixes:

pandas/io/formats/style.py

@@ -716,15 +716,25 @@ def to_latex(
             Possible values are:
 
               - `None`: no cline commands are added (default).
-              - `"all;data"`: a cline is added for every index value extending the
-                width of the table, including data entries.
+              - `"all;data"`: a cline is added for every visible index value extending
+                the width of the table, including data entries.
               - `"all;index"`: as above with lines extending only the width of the
                 index entries.
-              - `"skip-last;data"`: a cline is added for each index value except the
-                last level (which is never sparsified), extending the widtn of the
+              - `"all-invisible;data"`: a cline is added for every index value,
+                including hidden indexes, extending the full width of the table,
+                including data entries.
+              - `"all-invisible;index"`: as above with lines extending only the width
+                of the index entries.
+              - `"skip-last;data"`: a cline is added for each visible index value except
+                the last level (which is never sparsified), extending the widtn of the
                 table.
               - `"skip-last;index"`: as above with lines extending only the width of the
                 index entries.
+              - `"skip-last-invisible;data"`: a cline is added for each index value,
+                including hidden index levels, but excluding the last (which is never
+                sparsified), extending the width of the table.
+              - `"skip-last-invisible;index"`: as above with lines extending only the
+                width of the index entries.
 
             .. versionadded:: 1.4.0
         label : str, optional