message_list.py
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00001 # Software License Agreement (BSD License)
00002 #
00003 # Copyright (c) 2013, Open Source Robotics Foundation Inc.
00004 # All rights reserved.
00005 #
00006 # Redistribution and use in source and binary forms, with or without
00007 # modification, are permitted provided that the following conditions
00008 # are met:
00009 #
00010 #  * Redistributions of source code must retain the above copyright
00011 #    notice, this list of conditions and the following disclaimer.
00012 #  * Redistributions in binary form must reproduce the above
00013 #    copyright notice, this list of conditions and the following
00014 #    disclaimer in the documentation and/or other materials provided
00015 #    with the distribution.
00016 #  * Neither the name of Willow Garage, Inc. nor the names of its
00017 #    contributors may be used to endorse or promote products derived
00018 #    from this software without specific prior written permission.
00019 #
00020 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00021 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00023 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
00024 # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00025 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00026 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00027 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00028 # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00029 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
00030 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00031 # POSSIBILITY OF SUCH DAMAGE.
00032 
00033 
00034 class MessageList(object):
00035 
00036     def __init__(self):
00037         super(MessageList, self).__init__()
00038         self._messages = []
00039 
00040     def __getitem__(self, key):
00041         return self._messages[len(self._messages) - key - 1]
00042 
00043     def __delitem__(self, key):
00044         if isinstance(key, slice):
00045             assert key.step is None or key.step == 1, \
00046                 'MessageList.__delitem__ not implemented for slices with step argument ' \
00047                 'different than 1'
00048             del self._messages[len(self._messages) - key.stop:len(self._messages) - key.start]
00049         else:
00050             del self._messages[len(self._messages) - key - 1]
00051 
00052     def __iter__(self):
00053         return reversed(self._messages)
00054 
00055     def __reversed__(self):
00056         return iter(self._messages)
00057 
00058     def __contains__(self, item):
00059         return item in self._messages
00060 
00061     def __len__(self):
00062         return len(self._messages)
00063 
00064     def extend(self, item):
00065         self._messages.extend(item)


rqt_console
Author(s): Aaron Blasdel
autogenerated on Sat Jun 8 2019 20:58:08