rebase + add some more details to doc

Author: arw2019

pandas/core/frame.py

@@ -2199,8 +2199,10 @@ def to_feather(self, path, **kwargs) -> None:
 
         Parameters
         ----------
-        path : str
-            String file path.
+        path : str or file-like object
+            If a string, it will be used as Root Directory path. By file-like
+            object, we refer to objects with a write() method, such as
+            a file handler (e.g. via builtin open function) or io.BytesIO.
         **kwargs :
             Additional keywords passed to :func:`pyarrow.feather.write_feather`.
             Starting with pyarrow 0.17, this includes the `compression`,