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