From 6bad54bf2a1d432e81161153fe7ecf7270bd9a14 Mon Sep 17 00:00:00 2001
From: MomIsBestFriend <>
Date: Thu, 16 Jan 2020 05:44:04 +0200
Subject: [PATCH] TYP/CLN: Replaced "Optional[Hashable]" with "Label" from
 pandas._typing

---
 pandas/core/generic.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 0c413cd473bbc..b73f129fbda8e 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -37,6 +37,7 @@
     FilePathOrBuffer,
     FrameOrSeries,
     JSONSerializable,
+    Label,
     Level,
     Renamer,
 )
@@ -3009,10 +3010,10 @@ def to_csv(
         sep: str = ",",
         na_rep: str = "",
         float_format: Optional[str] = None,
-        columns: Optional[Sequence[Optional[Hashable]]] = None,
+        columns: Optional[Sequence[Label]] = None,
         header: Union[bool_t, List[str]] = True,
         index: bool_t = True,
-        index_label: Optional[Union[bool_t, str, Sequence[Optional[Hashable]]]] = None,
+        index_label: Optional[Union[bool_t, str, Sequence[Label]]] = None,
         mode: str = "w",
         encoding: Optional[str] = None,
         compression: Optional[Union[str, Mapping[str, str]]] = "infer",