intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 55 insertions, 0 deletions

diff --git a/contrib/python/ipython/py2/IPython/core/payload.py b/contrib/python/ipython/py2/IPython/core/payload.py
new file mode 100644
index 0000000000..6818be1537
--- /dev/null
+++ b/contrib/python/ipython/py2/IPython/core/payload.py
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+"""Payload system for IPython.
+
+Authors:
+
+* Fernando Perez
+* Brian Granger
+"""
+
+#-----------------------------------------------------------------------------
+#       Copyright (C) 2008-2011 The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+from traitlets.config.configurable import Configurable
+from traitlets import List
+
+#-----------------------------------------------------------------------------
+# Main payload class
+#-----------------------------------------------------------------------------
+
+class PayloadManager(Configurable):
+
+    _payload = List([])
+
+    def write_payload(self, data, single=True):
+        """Include or update the specified `data` payload in the PayloadManager.
+
+        If a previous payload with the same source exists and `single` is True,
+        it will be overwritten with the new one.
+        """
+
+        if not isinstance(data, dict):
+            raise TypeError('Each payload write must be a dict, got: %r' % data)
+
+        if single and 'source' in data:
+            source = data['source']
+            for i, pl in enumerate(self._payload):
+                if 'source' in pl and pl['source'] == source:
+                    self._payload[i] = data
+                    return
+
+        self._payload.append(data)
+
+    def read_payload(self):
+        return self._payload
+
+    def clear_payload(self):
+        self._payload = []