feat: Add type hints to rdflib.graph

More or less complete type hints for the rdflib.graph module.

Other changes:
- Improved/simplified type hints in `rdflib.store` and store plugins.
- Add type ignores for various type errors that occur with the type
  hints.

This is split-off from <#1850>.

This PR does not change runtime behaviour.

CHANGELOG.md

@@ -166,8 +166,10 @@ and will be removed for release.
 <!-- -->
 
 - Added type hints.
-  [PR #2057](https://github.com/RDFLib/rdflib/pull/2057).
   - `rdflib.store` and builtin stores have mostly complete type hints.
+    [PR #2057](https://github.com/RDFLib/rdflib/pull/2057).
+  - `rdflib.graph` have mostly complete type hints.
+    [PR #2080](https://github.com/RDFLib/rdflib/pull/2080).
 
 <!-- -->
 <!-- -->

devtools/diffrtpy.py

@@ -32,8 +32,16 @@
 from strip_hints import strip_string_to_string
 
 
-def clean_python(code: str) -> str:
-    code = strip_string_to_string(code, to_empty=True, strip_nl=True)
+def clean_python(input: Path) -> str:
+    code = input.read_text()
+    try:
+        code = strip_string_to_string(code, to_empty=True, strip_nl=True)
+    except Exception:
+        logging.warning(
+            "failed to strip type hints from %s, falling back to using with type hints",
+            input,
+        )
+        code = code
     code = python_minifier.minify(
         code,
         remove_annotations=True,
@@ -106,12 +114,9 @@ def handle(self, parse_result: argparse.Namespace) -> None:
             "base = %s, lhs_file = %s, rhs_file = %s", base, lhs_file, rhs_file
         )
 
-        lhs_file_content = lhs_file.read_text()
-        rhs_file_content = rhs_file.read_text()
-
         if lhs_file.name.endswith(".py") and rhs_file.name.endswith(".py"):
-            lhs_file_content = clean_python(lhs_file_content)
-            rhs_file_content = clean_python(rhs_file_content)
+            lhs_file_content = clean_python(lhs_file)
+            rhs_file_content = clean_python(rhs_file)
 
         lhs_file_lines = lhs_file_content.splitlines(keepends=True)
         rhs_file_lines = rhs_file_content.splitlines(keepends=True)

docs/conf.py

@@ -264,6 +264,7 @@ def find_version(filename):
     ("py:class", "importlib.metadata.EntryPoint"),
     ("py:class", "xml.dom.minidom.Document"),
     ("py:class", "xml.dom.minidom.DocumentFragment"),
+    ("py:class", "isodate.duration.Duration"),
     # sphinx-autodoc-typehints has some issues with TypeVars.
     # https://github.com/tox-dev/sphinx-autodoc-typehints/issues/39
     ("py:class", "rdflib.plugin.PluginT"),
@@ -282,13 +283,23 @@ def find_version(filename):
 if sys.version_info < (3, 9):
     nitpick_ignore.extend(
         [
-            ("py:class", "_TriplePatternType"),
-            ("py:class", "_TripleType"),
+            ("py:class", "_ContextIdentifierType"),
+            ("py:class", "_ContextType"),
+            ("py:class", "_GraphT"),
+            ("py:class", "_NamespaceSetString"),
             ("py:class", "_ObjectType"),
             ("py:class", "_PredicateType"),
+            ("py:class", "_QuadSelectorType"),
             ("py:class", "_SubjectType"),
-            ("py:class", "_ContextType"),
-            ("py:class", "_ContextIdentifierType"),
+            ("py:class", "_TripleOrPathTripleType"),
+            ("py:class", "_TripleOrQuadPathPatternType"),
+            ("py:class", "_TripleOrQuadPatternType"),
+            ("py:class", "_TriplePathPatternType"),
+            ("py:class", "_TriplePathType"),
+            ("py:class", "_TriplePatternType"),
+            ("py:class", "_TripleSelectorType"),
+            ("py:class", "_TripleType"),
+            ("py:class", "_TripleOrTriplePathType"),
             ("py:class", "TextIO"),
         ]
     )