pycharm配置webots外部控制器，同时添加多个路径，使得能够使用ROS

1. 先配置pycharm的Poject Structure

　　打开Pycharm --> File --> Settings --> Project:项目名 --> Project Structure --> +Add Content Root，添加上会用到的库

• /opt/ros/melodic/lib/python2.7/dist-packages
• /usr/local/webots/lib/controller/python39
• /home/xx/multi-robot-data-collection

2. 再配置LD_LIBRARY_PATH

　　Edit Configurations... --> Environment variables: --> LD_LIBRARY_PATH=/usr/local/webots/lib/controller

3. 在代码里

sys.path.append('/usr/local/webots/lib/controller/python39')

sys.path.append('/opt/ros/melodic/lib/python2.7/dist-packages')

sys.path.append(os.path.dirname(os.path.realpath(__file__)))

• /usr/local/webots/lib/controller/python39