From 979534c76421c5d009b8285d42c93cb746bbac34 Mon Sep 17 00:00:00 2001
From: Pascal Corpet <pcorpet@users.noreply.github.com>
Date: Thu, 7 Mar 2019 15:04:56 +0100
Subject: [PATCH] Prefer Mapping to Dict for input of csv DictWriter methods.
 (#2829)

---
 stdlib/2and3/csv.pyi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/2and3/csv.pyi b/stdlib/2and3/csv.pyi
index 5511d7d6f..5376c3cde 100644
--- a/stdlib/2and3/csv.pyi
+++ b/stdlib/2and3/csv.pyi
@@ -1,6 +1,6 @@
 from collections import OrderedDict
 import sys
-from typing import Any, Dict, Iterable, Iterator, List, Optional, Sequence, Union
+from typing import Any, Dict, Iterable, Iterator, List, Mapping, Optional, Sequence, Union
 
 from _csv import (_reader,
                   _writer,
@@ -19,7 +19,7 @@ from _csv import (_reader,
                   )
 
 _Dialect = Union[str, Dialect]
-_DictRow = Dict[str, Any]
+_DictRow = Mapping[str, Any]
 
 class Dialect(object):
     delimiter = ...  # type: str