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【rosrun diagnostic_analysis】报错No module named rospkg | ubuntu 20.04

article 2025/1/9 23:17:49

ubuntu20.04使用指令报错

现象
- rosrun diagnostic_analysis export_csv.py my.bag -d ~/Desktop
- 报错
  - Traceback (most recent call last): File "/opt/ros/noetic/lib/diagnostic_analysis/export_csv.py", line 40, in <module> import roslib; roslib.load_manifest(PKG) File "/opt/ros/noetic/lib/python3/dist-packages/roslib/__init__.py", line 50, in <module> from roslib.launcher import load_manifest # noqa: F401 File "/opt/ros/noetic/lib/python3/dist-packages/roslib/launcher.py", line 42, in <module> import rospkg ImportError: No module named rospkg
- pip install rospkg尝试安装，发现装完了
  - Looking in indexes: http://pypi.doubanio.com/simple Requirement already satisfied: rospkg in /usr/lib/python3/dist-packages (1.4.0)
原因
- Ubuntu20.04源仓库没有pip2 ， python2已经不再维护了
解决办法1
- wget https://bootstrap.pypa.io/pip/2.7/get-pip.py
- sudo python2 get-pip.py
- sudo rm get-pip.py
- pip2 install rospkg
解决办法2（推荐）
- sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100
- sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 200
- 默认使用python3