fix issue sagemath#36178

src/sage/misc/rest_index_of_methods.py

@@ -14,7 +14,7 @@
 from sage.misc.sageinspect import is_function_or_cython_function as _isfunction
 
 
-def gen_rest_table_index(obj, names=None, sort=True, only_local_functions=True):
+def gen_rest_table_index(obj, names=None, sort=True, only_local_functions=True, root=None):
     r"""
     Return a ReST table describing a list of functions.
 
@@ -43,6 +43,10 @@ def gen_rest_table_index(obj, names=None, sort=True, only_local_functions=True):
       will be filtered out. This can be useful to disable for making indexes of
       e.g. catalog modules such as :mod:`sage.coding.codes_catalog`.
 
+    - ``root`` -- (default: ``None``); the module, or class, whose elements are
+      to be listed. This is needed to recover the class when this method is
+      called from :meth:`gen_thematic_rest_table_index`.
+
     .. WARNING::
 
         The ReST tables returned by this function use '@' as a delimiter for
@@ -169,14 +173,24 @@ def gen_rest_table_index(obj, names=None, sort=True, only_local_functions=True):
     if sort:
         list_of_entries.sort(key=fname)
 
+    obj_or_root_is_class = False
+    if inspect.isclass(root):
+        obj_or_root_is_class = True
+        class_name = root.__name__
+        module_name = root.__module__
+    elif inspect.isclass(obj):
+        obj_or_root_is_class = True
+        class_name = obj.__name__
+        module_name = obj.__module__
+
     for e in list_of_entries:
         if inspect.ismethod(e):
             link = ":meth:`~{module}.{cls}.{func}`".format(
                 module=e.im_class.__module__, cls=e.im_class.__name__,
                 func=fname(e))
-        elif _isfunction(e) and inspect.isclass(obj):
+        elif _isfunction(e) and obj_or_root_is_class:
             link = ":meth:`~{module}.{cls}.{func}`".format(
-                module=obj.__module__, cls=obj.__name__, func=fname(e))
+                module=module_name, cls=class_name, func=fname(e))
         elif _isfunction(e):
             link = ":func:`~{module}.{func}`".format(
                 module=e.__module__, func=fname(e))
@@ -317,7 +331,7 @@ def gen_thematic_rest_table_index(root,additional_categories=None,only_local_fun
             except AttributeError:
                 doc_ind = "Unsorted"
         theme_to_function[doc_ind].append(f)
-    s = ["**"+theme+"**\n\n"+gen_rest_table_index(list_of_functions,names=names)
+    s = ["**" + theme + "**\n\n" + gen_rest_table_index(list_of_functions, names=names, root=root)
          for theme, list_of_functions in sorted(theme_to_function.items())]
     return "\n\n".join(s)