[+] improve typing

python/online/fxreader/pr34/commands_typed/pip.py

@@ -25,6 +25,7 @@ if typing.TYPE_CHECKING:
     import pip._internal.resolution.resolvelib.resolver
     import pip._internal.operations.prepare
     import pip._internal.index.package_finder
+    from pip._internal.req.req_install import InstallRequirement
 
 from typing import (
     Literal, Optional, Iterable, Any,
@@ -65,6 +66,14 @@ class pip_resolve_t:
             ignore_requires_python: Any,
         ) -> 'pip._internal.index.package_finder.PackageFinder': ...
 
+    class complete_partial_requirements_t(Protocol):
+        def __call__(
+            self,
+            _self: 'pip._internal.resolution.resolvelib.resolver.Resolver',
+            partially_downloaded_reqs: Iterable['InstallRequirement',],
+            parallel_builds: bool = False,
+        ) -> None: ...
+
     class kwargs_t:
         class mode_t(enum.StrEnum):
             copy_paste = "copy_paste"
@@ -381,7 +390,13 @@ def pip_resolve(
             )
             raise NotImplementedError
 
-        _complete_partial_requirements_def = pip._internal.operations.prepare.RequirementPreparer._complete_partial_requirements
+        _complete_partial_requirements_def = cast(
+            pip_resolve_t.complete_partial_requirements_t,
+            getattr(
+                pip._internal.operations.prepare.RequirementPreparer,
+                '_complete_partial_requirements',
+            )
+        )
 
         def _complete_partial_requirements(
             _self: pip._internal.resolution.resolvelib.resolver.Resolver,