style(app,blueprints): add some type hints (#2196)

* style(app,blueprints): add some type hints

* style(app): option is Any

* style(blueprints): url prefix default value is ``""``

* style(app): backward compatible

* style(app): backward compatible

* style(blueprints): defult is None

* style(app): apply code style (black)

sanic/app.py

@@ -30,6 +30,7 @@ from typing import (
     List,
     Optional,
     Set,
+    Tuple,
     Type,
     Union,
 )
@@ -411,7 +412,13 @@ class Sanic(BaseSanic):
 
         self.websocket_enabled = enable
 
-    def blueprint(self, blueprint, **options):
+    def blueprint(
+        self,
+        blueprint: Union[
+            Blueprint, List[Blueprint], Tuple[Blueprint], BlueprintGroup
+        ],
+        **options: Any,
+    ):
         """Register a blueprint on the application.
 
         :param blueprint: Blueprint object or (list, tuple) thereof
@@ -869,7 +876,7 @@ class Sanic(BaseSanic):
         *,
         debug: bool = False,
         auto_reload: Optional[bool] = None,
-        ssl: Union[dict, SSLContext, None] = None,
+        ssl: Union[Dict[str, str], SSLContext, None] = None,
         sock: Optional[socket] = None,
         workers: int = 1,
         protocol: Optional[Type[Protocol]] = None,
@@ -999,7 +1006,7 @@ class Sanic(BaseSanic):
         port: Optional[int] = None,
         *,
         debug: bool = False,
-        ssl: Union[dict, SSLContext, None] = None,
+        ssl: Union[Dict[str, str], SSLContext, None] = None,
         sock: Optional[socket] = None,
         protocol: Type[Protocol] = None,
         backlog: int = 100,

sanic/blueprints.py

@@ -146,10 +146,10 @@ class Blueprint(BaseSanic):
 
     @staticmethod
     def group(
-        *blueprints,
-        url_prefix="",
-        version=None,
-        strict_slashes=None,
+        *blueprints: Union[Blueprint, BlueprintGroup],
+        url_prefix: Optional[str] = None,
+        version: Optional[Union[int, str, float]] = None,
+        strict_slashes: Optional[bool] = None,
         version_prefix: str = "/v",
     ):
         """