Merged revisions 78623 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r78623 | lars.gustaebel | 2010-03-03 12:55:48 +0100 (Wed, 03 Mar 2010) | 3 lines

  Issue #7232: Add support for the context manager protocol
  to the TarFile class.
........

Lib/tarfile.py

@@ -2391,6 +2391,20 @@ class TarFile(object):
         """
         if level <= self.debug:
             print(msg, file=sys.stderr)
+
+    def __enter__(self):
+        self._check()
+        return self
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            self.close()
+        else:
+            # An exception occurred. We must not call close() because
+            # it would try to write end-of-archive blocks and padding.
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
 # class TarFile
 
 class TarIter: