From 58fed373805b12bef6ffa54a6d2750d27c9938d5 Mon Sep 17 00:00:00 2001
From: Martin Durant <martin.durant@alumni.utoronto.ca>
Date: Thu, 13 Jan 2022 12:47:17 -0500
Subject: [PATCH] Slice of Openfiles should also be Opnfiles

---
 fsspec/core.py            | 6 ++++++
 fsspec/tests/test_core.py | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/fsspec/core.py b/fsspec/core.py
index 8515de640..ac65c7a16 100644
--- a/fsspec/core.py
+++ b/fsspec/core.py
@@ -204,6 +204,12 @@ def __exit__(self, *args):
                     break
         [s.__exit__(*args) for s in self]
 
+    def __getitem__(self, item):
+        out = super().__getitem__(item)
+        if isinstance(item, slice):
+            return OpenFiles(out, mode=self.mode, fs=self.fs)
+        return out
+
     def __repr__(self):
         return "<List of %s OpenFile instances>" % len(self)
 
diff --git a/fsspec/tests/test_core.py b/fsspec/tests/test_core.py
index 23a2cddf4..d4cb6362d 100644
--- a/fsspec/tests/test_core.py
+++ b/fsspec/tests/test_core.py
@@ -184,6 +184,8 @@ def test_multi_context(tmpdir):
     assert isinstance(files, OpenFiles)
     assert isinstance(files[0], OpenFile)
     assert len(files) == 2
+    assert isinstance(files[:1], OpenFiles)
+    assert len(files[:1]) == 1
     with files as of:
         assert len(of) == 2
         assert not of[0].closed