From c879ff05aac14e15a5e3982c0975ae7ab341fd60 Mon Sep 17 00:00:00 2001
From: Eric Traut <eric@traut.com>
Date: Mon, 23 Sep 2019 09:24:45 -0700
Subject: [PATCH] Changed type of fieldname parameter in DictWriter __init__
 method from Sequence[str] to Iterable[str]. This allows it to work with the
 following code: (#3253)

---
 stdlib/2and3/csv.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/2and3/csv.pyi b/stdlib/2and3/csv.pyi
index da5c709df..28a35fab9 100644
--- a/stdlib/2and3/csv.pyi
+++ b/stdlib/2and3/csv.pyi
@@ -79,7 +79,7 @@ class DictWriter(object):
     restval: Optional[Any]
     extrasaction: str
     writer: _writer
-    def __init__(self, f: Any, fieldnames: Sequence[str],
+    def __init__(self, f: Any, fieldnames: Iterable[str],
                  restval: Optional[Any] = ..., extrasaction: str = ..., dialect: _Dialect = ...,
                  *args: Any, **kwds: Any) -> None: ...
     def writeheader(self) -> None: ...