Use variable annotations everywhere (#2909)

stdlib/3/urllib/error.pyi

@@ -4,9 +4,9 @@ from urllib.response import addinfourl
 # Stubs for urllib.error
 
 class URLError(IOError):
-    reason = ...  # type: Union[str, BaseException]
+    reason: Union[str, BaseException]
 class HTTPError(URLError, addinfourl):
-    code = ...  # type: int
-    headers = ...  # type: Dict[str, str]
+    code: int
+    headers: Dict[str, str]
     def __init__(self, url, code, msg, hdrs, fp) -> None: ...
 class ContentTooShortError(URLError): ...

stdlib/3/urllib/parse.pyi

@@ -5,13 +5,13 @@ import sys
 _Str = Union[bytes, str]
 
 
-uses_relative = ...  # type: List[str]
-uses_netloc = ...  # type: List[str]
-uses_params = ...  # type: List[str]
-non_hierarchical = ...  # type: List[str]
-uses_query = ...  # type: List[str]
-uses_fragment = ...  # type: List[str]
-scheme_chars = ...  # type: str
+uses_relative: List[str]
+uses_netloc: List[str]
+uses_params: List[str]
+non_hierarchical: List[str]
+uses_query: List[str]
+uses_fragment: List[str]
+scheme_chars: str
 MAX_CACHE_SIZE = 0
 
 class _ResultMixinBase(Generic[AnyStr]):
@@ -26,18 +26,18 @@ class _ResultMixinBytes(_ResultMixinBase[str]):
 
 
 class _NetlocResultMixinBase(Generic[AnyStr]):
-    username = ...  # type: AnyStr
-    password = ...  # type: AnyStr
-    hostname = ...  # type: AnyStr
-    port = ...  # type: int
+    username: AnyStr
+    password: AnyStr
+    hostname: AnyStr
+    port: int
 
 class _NetlocResultMixinStr(_NetlocResultMixinBase[str], _ResultMixinStr): ...
 
 class _NetlocResultMixinBytes(_NetlocResultMixinBase[bytes], _ResultMixinBytes): ...
 
 class _DefragResultBase(tuple, Generic[AnyStr]):
-    url = ...  # type: AnyStr
-    fragment = ...  # type: AnyStr
+    url: AnyStr
+    fragment: AnyStr
 
 
 _SplitResultBase = NamedTuple(