Turn mypy:no-any-return on

The 'no-any-return' error code has been disabled before due to the code
not being ready for it. This patch delivers amends to the code base, and
enables the rule that must be enabled.

pyproject.toml

@@ -100,7 +100,6 @@ disable_error_code = [
   "comparison-overlap",
   "import-not-found",
   "misc",
-  "no-any-return",
   "no-untyped-call",
   "no-untyped-def",
   "type-arg",

src/picobox/_stack.py

@@ -96,8 +96,8 @@ def do(magic):
     """
 
     def __init__(self, name: t.Optional[str] = None):
-        self._name = name
-        self._stack = []
+        self._name = name or "0x%x" % id(self)
+        self._stack: list[Box] = []
         self._lock = threading.Lock()
 
         # A proxy object that proxies all calls to a box instance on the top
@@ -108,10 +108,7 @@ def __init__(self, name: t.Optional[str] = None):
         self._topbox = _create_stack_proxy(self._stack)
 
     def __repr__(self):
-        name = self._name
-        if not self._name:
-            name = "0x%x" % id(self)
-        return "<Stack (%s)>" % name
+        return f"<Stack ({self._name})>"
 
     def push(self, box: Box, *, chain: bool = False) -> t.ContextManager[Box]:
         """Push a :class:`Box` instance to the top of the stack.

src/picobox/ext/asgiscopes.py

@@ -6,8 +6,12 @@
 
 import picobox
 
-_current_app_store = contextvars.ContextVar(f"{__name__}.current-app-store")
-_current_req_store = contextvars.ContextVar(f"{__name__}.current-req-store")
+if t.TYPE_CHECKING:
+    Store = contextvars.ContextVar[weakref.WeakKeyDictionary]
+
+
+_current_app_store: "Store" = contextvars.ContextVar(f"{__name__}.current-app-store")
+_current_req_store: "Store" = contextvars.ContextVar(f"{__name__}.current-req-store")
 
 
 class ScopeMiddleware:
@@ -52,7 +56,7 @@ async def __call__(self, scope, receive, send):
 class _asgiscope(picobox.Scope):
     """A base class for ASGI scopes."""
 
-    _store_cvar: contextvars.ContextVar
+    _store_cvar: "Store"
 
     @property
     def _store(self) -> t.MutableMapping[t.Hashable, t.Any]:

src/picobox/ext/wsgiscopes.py

@@ -9,9 +9,11 @@
 if t.TYPE_CHECKING:
     from _typeshed.wsgi import StartResponse, WSGIApplication, WSGIEnvironment
 
+    Store = contextvars.ContextVar[weakref.WeakKeyDictionary]
 
-_current_app_store = contextvars.ContextVar(f"{__name__}.current-app-store")
-_current_req_store = contextvars.ContextVar(f"{__name__}.current-req-store")
+
+_current_app_store: "Store" = contextvars.ContextVar(f"{__name__}.current-app-store")
+_current_req_store: "Store" = contextvars.ContextVar(f"{__name__}.current-req-store")
 
 
 class ScopeMiddleware:
@@ -61,7 +63,7 @@ def __call__(
 class _wsgiscope(picobox.Scope):
     """A base class for WSGI scopes."""
 
-    _store_cvar: contextvars.ContextVar
+    _store_cvar: "Store"
 
     @property
     def _store(self) -> t.MutableMapping[t.Hashable, t.Any]: