Type annotations

Author: pfmoore

src/pip/_internal/resolution/resolvelib/factory.py

@@ -120,7 +120,7 @@ def iter_found_candidates(self, ireq, extras):
         # requirement needs to return only one candidate per version, so we
         # implement that logic here so that requirements using this helper
         # don't all have to do the same thing later.
-        seen_versions = set()
+        seen_versions = set()  # type: Set[_BaseVersion]
 
         # Yield the installed version, if it matches, unless the user
         # specified `--force-reinstall`, when we want the version from

src/pip/_internal/resolution/resolvelib/resolver.py

@@ -69,7 +69,7 @@ def resolve(self, root_reqs, check_supported_wheels):
         # type: (List[InstallRequirement], bool) -> RequirementSet
 
         constraints = {}  # type: Dict[str, SpecifierSet]
-        user_requested = set()
+        user_requested = set()  # type: Set[str]
         requirements = []
         for req in root_reqs:
             if req.constraint: