Add missing Optional types in urllib.parse (#3263)

None values are accepted, and interpreted as empty (byte) strings by
some urllib.parse functions.

Author: robertschweizer

stdlib/3/urllib/parse.pyi

@@ -80,9 +80,9 @@ class SplitResultBytes(_SplitResultBytesBase, _NetlocResultMixinBytes): ...
 class ParseResultBytes(_ParseResultBytesBase, _NetlocResultMixinBytes): ...
 
 
-def parse_qs(qs: AnyStr, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> Dict[AnyStr, List[AnyStr]]: ...
+def parse_qs(qs: Optional[AnyStr], keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> Dict[AnyStr, List[AnyStr]]: ...
 
-def parse_qsl(qs: AnyStr, keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> List[Tuple[AnyStr, AnyStr]]: ...
+def parse_qsl(qs: Optional[AnyStr], keep_blank_values: bool = ..., strict_parsing: bool = ..., encoding: str = ..., errors: str = ...) -> List[Tuple[AnyStr, AnyStr]]: ...
 
 
 @overload
@@ -106,7 +106,7 @@ def unquote_plus(string: str, encoding: str = ..., errors: str = ...) -> str: ..
 @overload
 def urldefrag(url: str) -> DefragResult: ...
 @overload
-def urldefrag(url: bytes) -> DefragResultBytes: ...
+def urldefrag(url: Optional[bytes]) -> DefragResultBytes: ...
 
 def urlencode(
     query: Union[Mapping[Any, Any], Mapping[Any, Sequence[Any]], Sequence[Tuple[Any, Any]], Sequence[Tuple[Any, Sequence[Any]]]],
@@ -120,21 +120,23 @@ def urlencode(
 def urljoin(base: AnyStr, url: Optional[AnyStr], allow_fragments: bool = ...) -> AnyStr: ...
 
 @overload
-def urlparse(url: str, scheme: str = ..., allow_fragments: bool = ...) -> ParseResult: ...
+def urlparse(url: str, scheme: Optional[str] = ..., allow_fragments: bool = ...) -> ParseResult: ...
 @overload
-def urlparse(url: bytes, scheme: bytes = ..., allow_fragments: bool = ...) -> ParseResultBytes: ...
+def urlparse(url: Optional[bytes], scheme: Optional[bytes] = ..., allow_fragments: bool = ...) -> ParseResultBytes: ...
 
 @overload
-def urlsplit(url: str, scheme: str = ..., allow_fragments: bool = ...) -> SplitResult: ...
+def urlsplit(url: str, scheme: Optional[str] = ..., allow_fragments: bool = ...) -> SplitResult: ...
 @overload
-def urlsplit(url: bytes, scheme: bytes = ..., allow_fragments: bool = ...) -> SplitResultBytes: ...
+def urlsplit(url: Optional[bytes], scheme: Optional[bytes] = ..., allow_fragments: bool = ...) -> SplitResultBytes: ...
 
 @overload
-def urlunparse(components: Tuple[AnyStr, AnyStr, AnyStr, AnyStr, AnyStr, AnyStr]) -> AnyStr: ...
+def urlunparse(
+    components: Tuple[Optional[AnyStr], Optional[AnyStr], Optional[AnyStr], Optional[AnyStr], Optional[AnyStr], Optional[AnyStr]]
+) -> AnyStr: ...
 @overload
-def urlunparse(components: Sequence[AnyStr]) -> AnyStr: ...
+def urlunparse(components: Sequence[Optional[AnyStr]]) -> AnyStr: ...
 
 @overload
-def urlunsplit(components: Tuple[AnyStr, AnyStr, AnyStr, AnyStr, AnyStr]) -> AnyStr: ...
+def urlunsplit(components: Tuple[Optional[AnyStr], Optional[AnyStr], Optional[AnyStr], Optional[AnyStr], Optional[AnyStr]]) -> AnyStr: ...
 @overload
-def urlunsplit(components: Sequence[AnyStr]) -> AnyStr: ...
+def urlunsplit(components: Sequence[Optional[AnyStr]]) -> AnyStr: ...