Make wiring inspect exclsuions extensible

Author: ZipFile

src/dependency_injector/wiring.py

@@ -6,6 +6,8 @@
 import inspect
 import pkgutil
 import sys
+from contextlib import suppress
+from inspect import isbuiltin, isclass
 from types import ModuleType
 from typing import (
     TYPE_CHECKING,
@@ -15,6 +17,7 @@
     Dict,
     Iterable,
     Iterator,
+    List,
     Optional,
     Protocol,
     Set,
@@ -60,13 +63,11 @@ def get_origin(tp):
             return None
 
 
-MARKER_EXTRACTORS = []
+MARKER_EXTRACTORS: List[Callable[[Any], Any]] = []
+INSPECT_EXCLUSION_FILTERS: List[Callable[[Any], bool]] = [isbuiltin]
 
-try:
+with suppress(ImportError):
     from fastapi.params import Depends as FastAPIDepends
-except ImportError:
-    pass
-else:
 
     def extract_marker_from_fastapi(param: Any) -> Any:
         if isinstance(param, FastAPIDepends):
@@ -75,11 +76,8 @@ def extract_marker_from_fastapi(param: Any) -> Any:
 
     MARKER_EXTRACTORS.append(extract_marker_from_fastapi)
 
-try:
+with suppress(ImportError):
     from fast_depends.dependencies import Depends as FastDepends
-except ImportError:
-    pass
-else:
 
     def extract_marker_from_fast_depends(param: Any) -> Any:
         if isinstance(param, FastDepends):
@@ -89,16 +87,22 @@ def extract_marker_from_fast_depends(param: Any) -> Any:
     MARKER_EXTRACTORS.append(extract_marker_from_fast_depends)
 
 
-try:
-    import starlette.requests
-except ImportError:
-    starlette = None
+with suppress(ImportError):
+    from starlette.requests import Request as StarletteRequest
 
+    def is_starlette_request_cls(obj: Any) -> bool:
+        return isclass(obj) and _safe_is_subclass(obj, StarletteRequest)
 
-try:
-    import werkzeug.local
-except ImportError:
-    werkzeug = None
+    INSPECT_EXCLUSION_FILTERS.append(is_starlette_request_cls)
+
+
+with suppress(ImportError):
+    from werkzeug.local import LocalProxy as WerkzeugLocalProxy
+
+    def is_werkzeug_local_proxy(obj: Any) -> bool:
+        return isinstance(obj, WerkzeugLocalProxy)
+
+    INSPECT_EXCLUSION_FILTERS.append(is_werkzeug_local_proxy)
 
 from . import providers  # noqa: E402
 
@@ -416,30 +420,11 @@ def _create_providers_map(
         return providers_map
 
 
-class InspectFilter:
-
-    def is_excluded(self, instance: object) -> bool:
-        if self._is_werkzeug_local_proxy(instance):
+def is_excluded_from_inspect(obj: Any) -> bool:
+    for is_excluded in INSPECT_EXCLUSION_FILTERS:
+        if is_excluded(obj):
             return True
-        elif self._is_starlette_request_cls(instance):
-            return True
-        elif self._is_builtin(instance):
-            return True
-        else:
-            return False
-
-    def _is_werkzeug_local_proxy(self, instance: object) -> bool:
-        return werkzeug and isinstance(instance, werkzeug.local.LocalProxy)
-
-    def _is_starlette_request_cls(self, instance: object) -> bool:
-        return (
-            starlette
-            and isinstance(instance, type)
-            and _safe_is_subclass(instance, starlette.requests.Request)
-        )
-
-    def _is_builtin(self, instance: object) -> bool:
-        return inspect.isbuiltin(instance)
+    return False
 
 
 def wire(  # noqa: C901
@@ -460,7 +445,7 @@ def wire(  # noqa: C901
 
     for module in modules:
         for member_name, member in _get_members_and_annotated(module):
-            if _inspect_filter.is_excluded(member):
+            if is_excluded_from_inspect(member):
                 continue
 
             if _is_marker(member):
@@ -1064,7 +1049,6 @@ def is_loader_installed() -> bool:
 
 
 _patched_registry = PatchedRegistry()
-_inspect_filter = InspectFilter()
 _loader = AutoLoader()
 
 # Optimizations