Close #9075: autodoc: Add a config variable autodoc_unqualified_typehints

CHANGES

@@ -13,6 +13,9 @@ Deprecated
 Features added
 --------------
 
+* #9075: autodoc: Add a config variable :confval:`autodoc_unqualified_typehints`
+  to suppress the leading module names of typehints of function signatures (ex.
+  ``io.StringIO`` -> ``StringIO``)
 * #9831: Autosummary now documents only the members specified in a module's
   ``__all__`` attribute if :confval:`autosummary_ignore_module_all` is set to
   ``False``. The default behaviour is unchanged. Autogen also now supports

doc/usage/extensions/autodoc.rst

@@ -662,6 +662,13 @@ There are also config values that you can set:
    .. __: https://mypy.readthedocs.io/en/latest/kinds_of_types.html#type-aliases
    .. versionadded:: 3.3
 
+.. confval:: autodoc_unqualified_typehints
+
+   If True, the leading module names of typehints of function signatures (ex.
+   ``io.StringIO`` -> ``StringIO``).  Defaults to False.
+
+   .. versionadded:: 4.4
+
 .. confval:: autodoc_preserve_defaults
 
    If True, the default argument values of functions will be not evaluated on

sphinx/domains/python.py

@@ -80,7 +80,8 @@ class ModuleEntry(NamedTuple):
     deprecated: bool
 
 
-def type_to_xref(target: str, env: BuildEnvironment = None) -> addnodes.pending_xref:
+def type_to_xref(target: str, env: BuildEnvironment = None, suppress_prefix: bool = False
+                 ) -> addnodes.pending_xref:
     """Convert a type string to a cross reference node."""
     if target == 'None':
         reftype = 'obj'
@@ -101,6 +102,8 @@ def type_to_xref(target: str, env: BuildEnvironment = None) -> addnodes.pending_
     elif target.startswith('~'):
         target = target[1:]
         text = target.split('.')[-1]
+    elif suppress_prefix:
+        text = target.split('.')[-1]
     else:
         text = target
 
@@ -150,6 +153,8 @@ def unparse(node: ast.AST) -> List[Node]:
             return unparse(node.value)
         elif isinstance(node, ast.Index):
             return unparse(node.value)
+        elif isinstance(node, ast.Invert):
+            return [addnodes.desc_sig_punctuation('', '~')]
         elif isinstance(node, ast.List):
             result = [addnodes.desc_sig_punctuation('', '[')]
             if node.elts:
@@ -180,6 +185,8 @@ def unparse(node: ast.AST) -> List[Node]:
                     if isinstance(subnode, nodes.Text):
                         result[i] = nodes.literal('', '', subnode)
             return result
+        elif isinstance(node, ast.UnaryOp):
+            return unparse(node.op) + unparse(node.operand)
         elif isinstance(node, ast.Tuple):
             if node.elts:
                 result = []
@@ -209,12 +216,19 @@ def unparse(node: ast.AST) -> List[Node]:
 
     try:
         tree = ast_parse(annotation)
-        result = unparse(tree)
-        for i, node in enumerate(result):
+        result: List[Node] = []
+        for node in unparse(tree):
             if isinstance(node, nodes.literal):
-                result[i] = node[0]
+                result.append(node[0])
             elif isinstance(node, nodes.Text) and node.strip():
-                result[i] = type_to_xref(str(node), env)
+                if (result and isinstance(result[-1], addnodes.desc_sig_punctuation) and
+                        result[-1].astext() == '~'):
+                    result.pop()
+                    result.append(type_to_xref(str(node), env, suppress_prefix=True))
+                else:
+                    result.append(type_to_xref(str(node), env))
+            else:
+                result.append(node)
         return result
     except SyntaxError:
         return [type_to_xref(annotation, env)]

sphinx/ext/autodoc/__init__.py

@@ -1295,6 +1295,8 @@ def can_document_member(cls, member: Any, membername: str, isattr: bool, parent:
     def format_args(self, **kwargs: Any) -> str:
         if self.config.autodoc_typehints in ('none', 'description'):
             kwargs.setdefault('show_annotation', False)
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
 
         try:
             self.env.app.emit('autodoc-before-process-signature', self.object, False)
@@ -1323,6 +1325,9 @@ def add_directive_header(self, sig: str) -> None:
             self.add_line('   :async:', sourcename)
 
     def format_signature(self, **kwargs: Any) -> str:
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
+
         sigs = []
         if (self.analyzer and
                 '.'.join(self.objpath) in self.analyzer.overloads and
@@ -1561,6 +1566,8 @@ def get_user_defined_function_or_method(obj: Any, attr: str) -> Any:
     def format_args(self, **kwargs: Any) -> str:
         if self.config.autodoc_typehints in ('none', 'description'):
             kwargs.setdefault('show_annotation', False)
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
 
         try:
             self._signature_class, self._signature_method_name, sig = self._get_signature()
@@ -1582,6 +1589,9 @@ def format_signature(self, **kwargs: Any) -> str:
             # do not show signatures
             return ''
 
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
+
         sig = super().format_signature()
         sigs = []
 
@@ -2110,6 +2120,8 @@ def import_object(self, raiseerror: bool = False) -> bool:
     def format_args(self, **kwargs: Any) -> str:
         if self.config.autodoc_typehints in ('none', 'description'):
             kwargs.setdefault('show_annotation', False)
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
 
         try:
             if self.object == object.__init__ and self.parent != object:
@@ -2160,6 +2172,9 @@ def document_members(self, all_members: bool = False) -> None:
         pass
 
     def format_signature(self, **kwargs: Any) -> str:
+        if self.config.autodoc_unqualified_typehints:
+            kwargs.setdefault('unqualified_typehints', True)
+
         sigs = []
         if (self.analyzer and
                 '.'.join(self.objpath) in self.analyzer.overloads and
@@ -2833,6 +2848,7 @@ def setup(app: Sphinx) -> Dict[str, Any]:
     app.add_config_value('autodoc_typehints_description_target', 'all', True,
                          ENUM('all', 'documented'))
     app.add_config_value('autodoc_type_aliases', {}, True)
+    app.add_config_value('autodoc_unqualified_typehints', False, 'env')
     app.add_config_value('autodoc_warningiserror', True, True)
     app.add_config_value('autodoc_inherit_docstrings', True, True)
     app.add_event('autodoc-before-process-signature')

sphinx/util/inspect.py

@@ -744,10 +744,13 @@ def evaluate(annotation: Any, globalns: Dict, localns: Dict) -> Any:
 
 
 def stringify_signature(sig: inspect.Signature, show_annotation: bool = True,
-                        show_return_annotation: bool = True) -> str:
+                        show_return_annotation: bool = True,
+                        unqualified_typehints: bool = False) -> str:
     """Stringify a Signature object.
 
     :param show_annotation: Show annotation in result
+    :param unqualified_typehints: Show annotations as unqualified
+                                  (ex. io.StringIO -> StringIO)
     """
     args = []
     last_kind = None
@@ -771,7 +774,7 @@ def stringify_signature(sig: inspect.Signature, show_annotation: bool = True,
 
         if show_annotation and param.annotation is not param.empty:
             arg.write(': ')
-            arg.write(stringify_annotation(param.annotation))
+            arg.write(stringify_annotation(param.annotation, unqualified_typehints))
         if param.default is not param.empty:
             if show_annotation and param.annotation is not param.empty:
                 arg.write(' = ')
@@ -791,7 +794,7 @@ def stringify_signature(sig: inspect.Signature, show_annotation: bool = True,
             show_return_annotation is False):
         return '(%s)' % ', '.join(args)
     else:
-        annotation = stringify_annotation(sig.return_annotation)
+        annotation = stringify_annotation(sig.return_annotation, unqualified_typehints)
         return '(%s) -> %s' % (', '.join(args), annotation)