Fix annotations

12 files changed, 30 insertions, 29 deletions

diff --git a/sphinx/directives/other.py b/sphinx/directives/other.py
index cc76275b9..f5c0cccda 100644
--- a/sphinx/directives/other.py
+++ b/sphinx/directives/other.py
@@ -8,6 +8,7 @@
 """
 
 import re
+from typing import cast
 
 from docutils import nodes
 from docutils.parsers.rst import directives
@@ -365,7 +366,7 @@ class Only(SphinxDirective):
             # Use these depths to determine where the nested sections should
             # be placed in the doctree.
             n_sects_to_raise = current_depth - nested_depth + 1
-            parent = self.state.parent
+            parent = cast(nodes.Element, self.state.parent)
             for i in range(n_sects_to_raise):
                 if parent.parent:
                     parent = parent.parent
diff --git a/sphinx/environment/adapters/toctree.py b/sphinx/environment/adapters/toctree.py
index d217760aa..6ae720eb6 100644
--- a/sphinx/environment/adapters/toctree.py
+++ b/sphinx/environment/adapters/toctree.py
@@ -105,7 +105,7 @@ class TocTree:
                         if not subnode['anchorname']:
                             # give the whole branch a 'current' class
                             # (useful for styling it differently)
-                            branchnode = subnode
+                            branchnode = subnode  # type: nodes.Element
                             while branchnode:
                                 branchnode['classes'].append('current')
                                 branchnode = branchnode.parent
@@ -272,7 +272,7 @@ class TocTree:
         return ancestors
 
     def _toctree_prune(self, node, depth, maxdepth, collapse=False):
-        # type: (nodes.Node, int, int, bool) -> None
+        # type: (nodes.Element, int, int, bool) -> None
         """Utility: Cut a TOC at a specified depth."""
         for subnode in node.children[:]:
             if isinstance(subnode, (addnodes.compact_paragraph,
@@ -313,7 +313,7 @@ class TocTree:
         # type: (unicode, Builder, bool, Any) -> nodes.Node
         """Return the global TOC nodetree."""
         doctree = self.env.get_doctree(self.env.config.master_doc)
-        toctrees = []
+        toctrees = []  # type: List[addnodes.toctree]
         if 'includehidden' not in kwds:
             kwds['includehidden'] = True
         if 'maxdepth' not in kwds:
diff --git a/sphinx/ext/autosummary/__init__.py b/sphinx/ext/autosummary/__init__.py
index c7ab726ca..e47c2e1f0 100644
--- a/sphinx/ext/autosummary/__init__.py
+++ b/sphinx/ext/autosummary/__init__.py
@@ -644,7 +644,7 @@ def autolink_role(typ, rawtext, etext, lineno, inliner, options={}, content=[]):
 def get_rst_suffix(app):
     # type: (Sphinx) -> unicode
     def get_supported_format(suffix):
-        # type: (unicode) -> Tuple[unicode]
+        # type: (unicode) -> Tuple[unicode, ...]
         parser_class = app.registry.get_source_parsers().get(suffix)
         if parser_class is None:
             return ('restructuredtext',)
diff --git a/sphinx/ext/graphviz.py b/sphinx/ext/graphviz.py
index c56c7cebd..3c0cbed68 100644
--- a/sphinx/ext/graphviz.py
+++ b/sphinx/ext/graphviz.py
@@ -237,10 +237,6 @@ def render_dot(self, code, options, format, prefix='graphviz'):
 
     ensuredir(path.dirname(outfn))
 
-    # graphviz expects UTF-8 by default
-    if isinstance(code, text_type):
-        code = code.encode('utf-8')
-
     dot_args = [graphviz_dot]
     dot_args.extend(self.builder.config.graphviz_dot_args)
     dot_args.extend(['-T' + format, '-o' + outfn])
@@ -264,7 +260,7 @@ def render_dot(self, code, options, format, prefix='graphviz'):
     try:
         # Graphviz may close standard input when an error occurs,
         # resulting in a broken pipe on communicate()
-        stdout, stderr = p.communicate(code)
+        stdout, stderr = p.communicate(code.encode('utf-8'))
     except (OSError, IOError) as err:
         if err.errno not in (EPIPE, EINVAL):
             raise
diff --git a/sphinx/ext/imgmath.py b/sphinx/ext/imgmath.py
index 4ed831b64..31524bb84 100644
--- a/sphinx/ext/imgmath.py
+++ b/sphinx/ext/imgmath.py
@@ -154,7 +154,7 @@ def compile_math(latex, builder):
 
 
 def convert_dvi_to_image(command, name):
-    # type: (List[unicode], unicode) -> Tuple[unicode, unicode]
+    # type: (List[unicode], unicode) -> Tuple[bytes, bytes]
     """Convert DVI file to specific image format."""
     try:
         p = Popen(command, stdout=PIPE, stderr=PIPE)
diff --git a/sphinx/ext/napoleon/docstring.py b/sphinx/ext/napoleon/docstring.py
index 6a4778b52..c39939b16 100644
--- a/sphinx/ext/napoleon/docstring.py
+++ b/sphinx/ext/napoleon/docstring.py
@@ -13,7 +13,6 @@
 
 import inspect
 import re
-from collections.abc import Callable
 from functools import partial
 
 from sphinx.ext.napoleon.iterators import modify_iter
@@ -22,7 +21,7 @@ from sphinx.util.pycompat import UnicodeMixin
 
 if False:
     # For type annotation
-    from typing import Any, Dict, List, Tuple, Type, Union  # NOQA
+    from typing import Any, Callable, Dict, List, Tuple, Type, Union  # NOQA
     from sphinx.application import Sphinx  # NOQA
     from sphinx.config import Config as SphinxConfig  # NOQA
     from sphinx.util.typing import unicode  # NOQA
@@ -122,7 +121,7 @@ class GoogleDocstring(UnicodeMixin):
                 what = 'class'
             elif inspect.ismodule(obj):
                 what = 'module'
-            elif isinstance(obj, Callable):
+            elif callable(obj):
                 what = 'function'
             else:
                 what = 'object'
diff --git a/sphinx/registry.py b/sphinx/registry.py
index c2085d03d..1bc95e9b0 100644
--- a/sphinx/registry.py
+++ b/sphinx/registry.py
@@ -43,6 +43,7 @@ if False:
     from sphinx.domains import Domain, Index  # NOQA
     from sphinx.environment import BuildEnvironment  # NOQA
     from sphinx.ext.autodoc import Documenter  # NOQA
+    from sphinx.io import SphinxFileInput  # NOQA
     from sphinx.util.typing import RoleFunction, TitleGetter, unicode  # NOQA
 
 logger = logging.getLogger(__name__)
@@ -337,7 +338,7 @@ class SphinxComponentRegistry:
         return parser
 
     def add_source_input(self, input_class, override=False):
-        # type: (Type[Input], bool) -> None
+        # type: (Type[SphinxFileInput], bool) -> None
         for filetype in input_class.supported:
             if filetype in self.source_inputs and not override:
                 raise ExtensionError(__('source_input for %r is already registered') %
diff --git a/sphinx/transforms/__init__.py b/sphinx/transforms/__init__.py
index acbd38226..387dd70bd 100644
--- a/sphinx/transforms/__init__.py
+++ b/sphinx/transforms/__init__.py
@@ -383,7 +383,7 @@ class SphinxSmartQuotes(SmartQuotes, SphinxTransform):
 
     @property
     def smartquotes_action(self):
-        # type: () -> unicode
+        # type: () -> str
         """A smartquotes_action setting for SmartQuotes.
 
         Users can change this setting through :confval:`smartquotes_action`.
diff --git a/sphinx/transforms/i18n.py b/sphinx/transforms/i18n.py
index ff5ecaade..98263dbc0 100644
--- a/sphinx/transforms/i18n.py
+++ b/sphinx/transforms/i18n.py
@@ -30,7 +30,7 @@ from sphinx.util.pycompat import indent
 
 if False:
     # For type annotation
-    from typing import Dict, List, Tuple  # NOQA
+    from typing import Dict, List, Tuple, Type  # NOQA
     from sphinx.application import Sphinx  # NOQA
     from sphinx.config import Config  # NOQA
     from sphinx.util.typing import unicode  # NOQA
@@ -265,15 +265,17 @@ class Locale(SphinxTransform):
                 patch = patch.next_node()
 
             # ignore unexpected markups in translation message
-            if not isinstance(patch, (
-                              (nodes.paragraph,  # expected form of translation
-                               nodes.title,  # generated by above "Subelements phase2"
-                               ) +
-                              # following types are expected if
-                              # config.gettext_additional_targets is configured
-                              LITERAL_TYPE_NODES +
-                              IMAGE_TYPE_NODES
-                              )):
+            unexpected = (
+                nodes.paragraph,    # expected form of translation
+                nodes.title         # generated by above "Subelements phase2"
+            )  # type: Tuple[Type[nodes.Element], ...]
+
+            # following types are expected if
+            # config.gettext_additional_targets is configured
+            unexpected += LITERAL_TYPE_NODES
+            unexpected += IMAGE_TYPE_NODES
+
+            if not isinstance(patch, unexpected):
                 continue  # skip
 
             # auto-numbered foot note reference should use original 'ids'.
diff --git a/sphinx/transforms/post_transforms/__init__.py b/sphinx/transforms/post_transforms/__init__.py
index 2e6f8b1ba..de1aa52ba 100644
--- a/sphinx/transforms/post_transforms/__init__.py
+++ b/sphinx/transforms/post_transforms/__init__.py
@@ -9,6 +9,8 @@
     :license: BSD, see LICENSE for details.
 """
 
+from typing import cast
+
 from docutils import nodes
 
 from sphinx import addnodes
@@ -39,7 +41,7 @@ class ReferencesResolver(SphinxTransform):
     def apply(self, **kwargs):
         # type: (Any) -> None
         for node in self.document.traverse(addnodes.pending_xref):
-            contnode = node[0].deepcopy()
+            contnode = cast(nodes.TextElement, node[0].deepcopy())
             newnode = None
 
             typ = node['reftype']
diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 0134360c4..f0ce485d7 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -1756,7 +1756,7 @@ class LaTeXTranslator(SphinxTranslator):
             length = None
             if 'width' in node:
                 length = self.latex_image_length(node['width'])
-            elif 'width' in node[0]:
+            elif isinstance(node[0], nodes.image) and 'width' in node[0]:
                 length = self.latex_image_length(node[0]['width'])
             self.body.append('\\begin{wrapfigure}{%s}{%s}\n\\centering' %
                              (node['align'] == 'right' and 'r' or 'l', length or '0pt'))
diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index 6fa676b0f..c15050574 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -300,7 +300,7 @@ class TexinfoTranslator(SphinxTranslator):
                         for name, content in self.indices]
         # each section is also a node
         for section in self.document.traverse(nodes.section):
-            title = section.next_node(nodes.Titular)
+            title = cast(nodes.TextElement, section.next_node(nodes.Titular))
             name = (title and title.astext()) or '<untitled>'
             section['node_name'] = add_node_name(name)