Close #6361: autodoc: Add autodoc_typehints to suppress typehints from signature

CHANGES

@@ -85,6 +85,8 @@ Features added
 * #744: autodoc: Support abstractmethod
 * #6325: autodoc: Support attributes in __slots__.  For dict-style __slots__,
   autodoc considers values as a docstring of the attribute
+* #6361: autodoc: Add :confval:`autodoc_typehints` to suppress typehints from
+  signature
 * #6212 autosummary: Add :confval:`autosummary_imported_members` to display
   imported members on autosummary
 * #6271: ``make clean`` is catastrophically broken if building into '.'

doc/usage/extensions/autodoc.rst

@@ -431,6 +431,16 @@ There are also config values that you can set:
       This config value only requires to declare the top-level modules that
       should be mocked.
 
+.. confval:: autodoc_typehints
+
+   This value controls how to represents typehints.  The setting takes the
+   following values:
+
+   * ``'signature'`` -- Show typehints as its signature (default)
+   * ``'none'`` -- Do not show typehints
+
+   .. versionadded: 2.1
+
 .. confval:: autodoc_warningiserror
 
    This value controls the behavior of :option:`sphinx-build -W` during

sphinx/ext/autodoc/__init__.py

@@ -17,6 +17,7 @@ from typing import Any
 from docutils.statemachine import StringList
 
 import sphinx
+from sphinx.config import ENUM
 from sphinx.deprecation import (
     RemovedInSphinx30Warning, RemovedInSphinx40Warning, deprecated_alias
 )
@@ -1007,6 +1008,9 @@ class FunctionDocumenter(DocstringSignatureMixin, ModuleLevelDocumenter):  # typ
 
     def format_args(self, **kwargs):
         # type: (Any) -> str
+        if self.env.config.autodoc_typehints == 'none':
+            kwargs.setdefault('show_annotation', False)
+
         if inspect.isbuiltin(self.object) or inspect.ismethoddescriptor(self.object):
             # cannot introspect arguments of a C function or method
             return None
@@ -1106,6 +1110,9 @@ class ClassDocumenter(DocstringSignatureMixin, ModuleLevelDocumenter):  # type:
 
     def format_args(self, **kwargs):
         # type: (Any) -> str
+        if self.env.config.autodoc_typehints == 'none':
+            kwargs.setdefault('show_annotation', False)
+
         # for classes, the relevant signature is the __init__ method's
         initmeth = self.get_attr(self.object, '__init__', None)
         # classes without __init__ method, default __init__ or
@@ -1320,6 +1327,9 @@ class MethodDocumenter(DocstringSignatureMixin, ClassLevelDocumenter):  # type:
 
     def format_args(self, **kwargs):
         # type: (Any) -> str
+        if self.env.config.autodoc_typehints == 'none':
+            kwargs.setdefault('show_annotation', False)
+
         if inspect.isbuiltin(self.object) or inspect.ismethoddescriptor(self.object):
             # can never get arguments of a C function or method
             return None
@@ -1612,6 +1622,7 @@ def setup(app):
     app.add_config_value('autodoc_default_options', {}, True)
     app.add_config_value('autodoc_docstring_signature', True, True)
     app.add_config_value('autodoc_mock_imports', [], True)
+    app.add_config_value('autodoc_typehints', "signature", True, ENUM("signature", "none"))
     app.add_config_value('autodoc_warningiserror', True, True)
     app.add_config_value('autodoc_inherit_docstrings', True, True)
     app.add_event('autodoc-process-docstring')

tests/roots/test-ext-autodoc/target/typehints.py

@@ -0,0 +1,10 @@
+def incr(a: int, b: int = 1) -> int:
+    return a + b
+
+
+class Math:
+    def __init__(self, s: str, o: object = None) -> None:
+        pass
+
+    def incr(self, a: int, b: int = 1) -> int:
+        return a + b

tests/test_autodoc.py

@@ -1689,6 +1689,58 @@ def test_partialmethod(app):
     assert list(actual) == expected
 
 
+@pytest.mark.sphinx('html', testroot='ext-autodoc')
+def test_autodoc_typehints_signature(app):
+    app.config.autodoc_typehints = "signature"
+
+    options = {"members": None,
+               "undoc-members": True}
+    actual = do_autodoc(app, 'module', 'target.typehints', options)
+    assert list(actual) == [
+        '',
+        '.. py:module:: target.typehints',
+        '',
+        '',
+        '.. py:class:: Math(s: str, o: object = None)',
+        '   :module: target.typehints',
+        '',
+        '   ',
+        '   .. py:method:: Math.incr(a: int, b: int = 1) -> int',
+        '      :module: target.typehints',
+        '   ',
+        '',
+        '.. py:function:: incr(a: int, b: int = 1) -> int',
+        '   :module: target.typehints',
+        ''
+    ]
+
+
+@pytest.mark.sphinx('html', testroot='ext-autodoc')
+def test_autodoc_typehints_none(app):
+    app.config.autodoc_typehints = "none"
+
+    options = {"members": None,
+               "undoc-members": True}
+    actual = do_autodoc(app, 'module', 'target.typehints', options)
+    assert list(actual) == [
+        '',
+        '.. py:module:: target.typehints',
+        '',
+        '',
+        '.. py:class:: Math(s, o = None)',
+        '   :module: target.typehints',
+        '',
+        '   ',
+        '   .. py:method:: Math.incr(a, b = 1) -> int',
+        '      :module: target.typehints',
+        '   ',
+        '',
+        '.. py:function:: incr(a, b = 1) -> int',
+        '   :module: target.typehints',
+        ''
+    ]
+
+
 @pytest.mark.sphinx('html', testroot='ext-autodoc')
 @pytest.mark.filterwarnings('ignore:autodoc_default_flags is now deprecated.')
 def test_merge_autodoc_default_flags1(app):