From ac625351643d5732bcaa77844ef1506bf5c978ab Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <solipsis@pitrou.net>
Date: Wed, 9 Dec 2009 00:01:27 +0000
Subject: Issue #7461: objects returned by os.popen() should support the
 context manager protocol

---
 Lib/os.py              | 4 ++++
 Lib/test/test_popen.py | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/Lib/os.py b/Lib/os.py
index ec5d280..2a9937f 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -650,6 +650,10 @@ class _wrap_close:
             return returncode
         else:
             return returncode << 8  # Shift left to match old behavior
+    def __enter__(self):
+        return self
+    def __exit__(self, *args):
+        self.close()
     def __getattr__(self, name):
         return getattr(self._stream, name)
     def __iter__(self):
diff --git a/Lib/test/test_popen.py b/Lib/test/test_popen.py
index 99ad41d..24fb846 100644
--- a/Lib/test/test_popen.py
+++ b/Lib/test/test_popen.py
@@ -49,6 +49,14 @@ class PopenTest(unittest.TestCase):
         else:
             self.assertEqual(os.popen("exit 42").close(), 42 << 8)
 
+    def test_contextmanager(self):
+        with os.popen("echo hello") as f:
+            self.assertEqual(f.read(), "hello\n")
+
+    def test_iterating(self):
+        with os.popen("echo hello") as f:
+            self.assertEqual(list(f), ["hello\n"])
+
 def test_main():
     support.run_unittest(PopenTest)
 
-- 
cgit v0.12