From e04a8bd42299300f25b781933de94ff422aa0ced Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Mon, 6 Jan 2020 03:46:28 +0100
Subject: [PATCH 1/2] Update/fix type for (Immutable)MultiDict's `*args`

Tested/used in https://github.com/encode/starlette/blob/c80558e0/tests/test_datastructures.py#L325
---
 starlette/datastructures.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/starlette/datastructures.py b/starlette/datastructures.py
index 40806246f..d352add71 100644
--- a/starlette/datastructures.py
+++ b/starlette/datastructures.py
@@ -237,11 +237,11 @@ def __str__(self) -> str:
 class ImmutableMultiDict(typing.Mapping):
     def __init__(
         self,
-        *args: typing.Union[
+        *args: typing.Optional[typing.Union[
             "ImmutableMultiDict",
             typing.Mapping,
             typing.List[typing.Tuple[typing.Any, typing.Any]],
-        ],
+        ]],
         **kwargs: typing.Any,
     ) -> None:
         assert len(args) < 2, "Too many arguments."
@@ -364,11 +364,11 @@ def append(self, key: typing.Any, value: typing.Any) -> None:
 
     def update(
         self,
-        *args: typing.Union[
+        *args: typing.Optional[typing.Union[
             "MultiDict",
             typing.Mapping,
             typing.List[typing.Tuple[typing.Any, typing.Any]],
-        ],
+        ]],
         **kwargs: typing.Any,
     ) -> None:
         value = MultiDict(*args, **kwargs)

From 51f863e6e21b81f482f41e39e0929d93adf844db Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Mon, 6 Jan 2020 03:51:31 +0100
Subject: [PATCH 2/2] black

---
 starlette/datastructures.py | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/starlette/datastructures.py b/starlette/datastructures.py
index d352add71..243f9a894 100644
--- a/starlette/datastructures.py
+++ b/starlette/datastructures.py
@@ -237,11 +237,13 @@ def __str__(self) -> str:
 class ImmutableMultiDict(typing.Mapping):
     def __init__(
         self,
-        *args: typing.Optional[typing.Union[
-            "ImmutableMultiDict",
-            typing.Mapping,
-            typing.List[typing.Tuple[typing.Any, typing.Any]],
-        ]],
+        *args: typing.Optional[
+            typing.Union[
+                "ImmutableMultiDict",
+                typing.Mapping,
+                typing.List[typing.Tuple[typing.Any, typing.Any]],
+            ]
+        ],
         **kwargs: typing.Any,
     ) -> None:
         assert len(args) < 2, "Too many arguments."
@@ -364,11 +366,13 @@ def append(self, key: typing.Any, value: typing.Any) -> None:
 
     def update(
         self,
-        *args: typing.Optional[typing.Union[
-            "MultiDict",
-            typing.Mapping,
-            typing.List[typing.Tuple[typing.Any, typing.Any]],
-        ]],
+        *args: typing.Optional[
+            typing.Union[
+                "MultiDict",
+                typing.Mapping,
+                typing.List[typing.Tuple[typing.Any, typing.Any]],
+            ]
+        ],
         **kwargs: typing.Any,
     ) -> None:
         value = MultiDict(*args, **kwargs)