已解決：No module named warehouse_ros

問題：No module named warehouse_ros

環境：
ubuntu16.04 + ros kinetic

源由：make a nav ROS android App一直是wait map list
發現問題：沒有打開world_canvas_server功能包
安裝功能包之後，運行world_canvas_server節點，出現下面問題
問題1：No module named uniqued_id
sudo apt-get install ros-kinetic-uniqued-id
再運行world_canvas_server節點，出現下面問題

錯誤詳細內容：

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$ roslaunch world_canvas_server world_canvas_server.launch debug:=true --screen
... logging to /home/ruffsl/.ros/log/35a221f2-a7a7-11e6-82a1-2c56dc38be90/roslaunch-cog-1-4257.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://cog-1:40164/

SUMMARY
========

PARAMETERS
 * /rosdistro: kinetic
 * /rosversion: 1.12.5
 * /world_canvas_server/auto_save_map: False
 * /world_canvas_server/start_map_manager: True

NODES
  /
    world_canvas_server (world_canvas_server/world_canvas_server)

ROS_MASTER_URI=http://localhost:11311

core service [/rosout] found
process[world_canvas_server-1]: started with pid [4275]
Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/world_canvas_server/world_canvas_server", line 6, in <module>
    import world_canvas_server
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/world_canvas_server/__init__.py", line 1, in <module>
    from .annotations_server import *
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/world_canvas_server/annotations_server.py", line 40, in <module>
    import warehouse_ros as wr
ImportError: No module named warehouse_ros
[world_canvas_server-1] process has died [pid 4275, exit code 1, cmd /opt/ros/kinetic/lib/world_canvas_server/world_canvas_server true __name:=world_canvas_server __log:=/home/ruffsl/.ros/log/35a221f2-a7a7-11e6-82a1-2c56dc38be90/world_canvas_server-1.log].
log file: /home/ruffsl/.ros/log/35a221f2-a7a7-11e6-82a1-2c56dc38be90/world_canvas_server-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done
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解決方法：

依次在終端中執行下面命令，catkin工作空間若不同（catkin_ws），自行對應更改
下面的命令不能省略，warehouse_ros和warehouse_ros_mongo都要源碼安裝

cd catkin_ws/src

git clone https://github.com/ros-planning/warehouse_ros.git

git clone https://github.com/ros-planning/warehouse_ros_mongo.git

cd

git clone -b 26compat https://github.com/mongodb/mongo-cxx-driver.git

sudo apt-get install scons

cd mongo-cxx-driver

sudo scons --prefix=/usr/local/ --full --use-system-boost --disable-warnings-as-errors

cd 

cd catkin_ws

catkin_make

編譯成功之後，按照之前錯誤提示：File “/opt/ros/kinetic/lib/python2.7/dist-packages/world_canvas_server/annotations_server.py”, line 40, in
import warehouse_ros as wr
將/opt/ros/kinetic/lib/python2.7/dist-packages/world_canvas_server/目錄下文件中，所有的warehouse_ros更改爲warehouse_ros_mongo，在annotations_server.py、map_manager.py、yaml_database.py中，一共三處
修改完成之後，再次執行world_canvas_server功能節點，如果還有提示錯誤，依然將對應文件中的warehouse_ros更改爲warehouse_ros_mongo

至此，完美解決

參考：
https://github.com/ros-planning/warehouse_ros
https://github.com/ros-planning/warehouse_ros_mongo
https://github.com/corot/world_canvas/issues/48
https://answers.ros.org/question/264471/how-to-install-mongodb-for-ros-kinetic/