Close #8573: napoleon: Add more custom section styles

doc/usage/extensions/napoleon.rst

@@ -547,3 +547,27 @@ sure that "sphinx.ext.napoleon" is enabled in `conf.py`::
    has an annotation in the class body, that type is used.
 
    .. versionadded:: 3.4
+
+.. confval:: napoleon_custom_sections
+
+   Add a list of custom sections to include, expanding the list of parsed sections.
+   *Defaults to None.*
+
+   The entries can either be strings or tuples, depending on the intention:
+
+   * To create a custom "generic" section, just pass a string.
+   * To create an alias for an existing section, pass a tuple containing the
+     alias name and the original, in that order.
+   * To create a custom section that displays like the parameters or returns
+     section, pass a tuple containing the custom section name and a string
+     value, "params_style" or "returns_style".
+
+   If an entry is just a string, it is interpreted as a header for a generic
+   section. If the entry is a tuple/list/indexed container, the first entry
+   is the name of the section, the second is the section key to emulate. If the
+   second entry value is "params_style" or "returns_style", the custom section
+   will be displayed like the parameters section or returns section.
+
+   .. versionadded:: 1.8
+   .. versionchanged:: 3.5
+      Support ``params_style`` and ``returns_style``

sphinx/ext/napoleon/__init__.py

@@ -253,10 +253,15 @@ class Config:
           * To create a custom "generic" section, just pass a string.
           * To create an alias for an existing section, pass a tuple containing the
             alias name and the original, in that order.
+          * To create a custom section that displays like the parameters or returns
+            section, pass a tuple containing the custom section name and a string
+            value, "params_style" or "returns_style".
 
         If an entry is just a string, it is interpreted as a header for a generic
         section. If the entry is a tuple/list/indexed container, the first entry
-        is the name of the section, the second is the section key to emulate.
+        is the name of the section, the second is the section key to emulate. If the
+        second entry value is "params_style" or "returns_style", the custom section
+        will be displayed like the parameters section or returns section.
 
     napoleon_attr_annotations : :obj:`bool` (Defaults to True)
         Use the type annotations of class attributes that are documented in the docstring

sphinx/ext/napoleon/docstring.py

@@ -549,6 +549,13 @@ class GoogleDocstring:
                     self._sections[entry.lower()] = self._parse_custom_generic_section
                 else:
                     # otherwise, assume entry is container;
+                    if entry[1] == "params_style":
+                        self._sections[entry[0].lower()] = \
+                            self._parse_custom_params_style_section
+                    elif entry[1] == "returns_style":
+                        self._sections[entry[0].lower()] = \
+                            self._parse_custom_returns_style_section
+                    else:
                         # [0] is new section, [1] is the section to alias.
                         # in the case of key mismatch, just handle as generic section.
                         self._sections[entry[0].lower()] = \
@@ -641,6 +648,13 @@ class GoogleDocstring:
         # for now, no admonition for simple custom sections
         return self._parse_generic_section(section, False)
 
+    def _parse_custom_params_style_section(self, section: str) -> List[str]:
+        return self._format_fields(section, self._consume_fields())
+
+    def _parse_custom_returns_style_section(self, section: str) -> List[str]:
+        fields = self._consume_returns_section()
+        return self._format_fields(section, fields)
+
     def _parse_usage_section(self, section: str) -> List[str]:
         header = ['.. rubric:: Usage:', '']
         block = ['.. code-block:: python', '']

tests/test_ext_napoleon_docstring.py

@@ -1072,10 +1072,27 @@ You should listen to me!
 Sooper Warning:
     Stop hitting yourself!
 """, """:Warns: **Stop hitting yourself!**
+"""),
+                      ("""\
+Params Style:
+    arg1 (int): Description of arg1
+    arg2 (str): Description of arg2
+
+""", """\
+:Params Style: * **arg1** (*int*) -- Description of arg1
+               * **arg2** (*str*) -- Description of arg2
+"""),
+                      ("""\
+Returns Style:
+    description of custom section
+
+""", """:Returns Style: description of custom section
 """))
 
         testConfig = Config(napoleon_custom_sections=['Really Important Details',
-                                                      ('Sooper Warning', 'warns')])
+                                                      ('Sooper Warning', 'warns'),
+                                                      ('Params Style', 'params_style'),
+                                                      ('Returns Style', 'returns_style')])
 
         for docstring, expected in docstrings:
             actual = str(GoogleDocstring(docstring, testConfig))