From cb7e4f3bde61584f7f3ada162251a9563caf74f2 Mon Sep 17 00:00:00 2001
From: Thierry Moisan <thierry.moisan@gmail.com>
Date: Mon, 7 Mar 2022 21:34:42 -0500
Subject: [PATCH] TYP: add type annotation to DataFrame.to_pickle

---
 pandas/core/generic.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index a0621e1ff9306..80af10383e24e 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -2956,7 +2956,7 @@ def to_sql(
     )
     def to_pickle(
         self,
-        path,
+        path: FilePath | WriteBuffer[bytes],
         compression: CompressionOptions = "infer",
         protocol: int = pickle.HIGHEST_PROTOCOL,
         storage_options: StorageOptions = None,
@@ -2966,8 +2966,10 @@ def to_pickle(
 
         Parameters
         ----------
-        path : str
-            File path where the pickled object will be stored.
+        path : str, path object, or file-like object
+            String, path object (implementing ``os.PathLike[str]``), or file-like
+            object implementing a binary ``write()`` function. File path where
+            the pickled object will be stored.
         {compression_options}
         protocol : int
             Int which indicates which protocol should be used by the pickler,