ROS使用过程中出现的问题：由于Anaconda的Python路径问题造成rqt_graph报错

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2017年6月28日：rqt工具报错与Python版本问题（已解决）

电脑已装Anaconda3，默认Python为Python3.6.1，按ROS wiki安装并按Beginner Tutorial一步步操作，在第五个教程Understanding Topics出现问题如下。
运行rosrun rqt_graph rqt_graph报错

Could not import "pyqt" bindings of qt_gui_cpp library - so C++ plugins will not be available:Traceback (most recent call last):  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui_cpp/cpp_binding_helper.py", line 43, in <module>    import libqt_gui_cpp_sipModuleNotFoundError: No module named 'libqt_gui_cpp_sip'Traceback (most recent call last):  File "/opt/ros/kinetic/lib/rqt_graph/rqt_graph", line 8, in <module>    sys.exit(main.main(sys.argv, standalone='rqt_graph.ros_graph.RosGraph'))  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_gui/main.py", line 59, in main    return super(Main, self).main(argv, standalone=standalone, plugin_argument_provider=plugin_argument_provider, plugin_manager_settings_prefix=str(hash(os.environ['ROS_PACKAGE_PATH'])))  File "/opt/ros/kinetic/lib/python2.7/dist-packages/qt_gui/main.py", line 505, in main    plugin = plugins.keys()[0]TypeError: 'dict_keys' object does not support indexing

google了一下，不少人出现类似问题，应该和Python版本有关，把默认Python换回2.7.12，重新安装rqt和rqt-common-plugins依然不行。

解决方法：注释掉.bashrc文件中Anaconda添加的路径

参考python-anaconda-how-to-safely-uninstall
1.找到.bashrc文件中这一行，并注释掉

# added by Anaconda3 4.3.1 installer#export PATH="/home/deeplearning/anaconda3/bin:$PATH"

2.打开新窗口，运行

rosrun rqt_graph rqt_graph

3.成功运行没有报错

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