Question

在Ubuntu 16.04上，我使用以下命令创建了一个环境： conda create -n ros2 python=2.7

然后像这样激活它：conda activate ros2

但是随后python --version给出了“ Python 3.5.2”

为什么会这样？如何将python的版本设置为2.7？

which python给出了“ / home / brads / anaconda3 / envs / ros2 / bin / python”

echo $PATH给出：“ / opt / ros / kinetic / bin：/ home / brads / anaconda3 / envs / ros2 / bin：/ home / brads / anaconda3 / condabin：/ home / brads / bin：/主页/brads/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games ：/ usr / local / cuda / bin：/ snap / bin“

/opt/ros/kinetic/bin的内容：

binvox2bt                 edit_octree                     opencv_waldboost_detector  roslaunch-deps  rosservice   rqt_dep           stage
bt2vrml                   eval_octree_accuracy            rosbag                     roslaunch-logs  rossrv       rqt_graph         tf_remap
catkin_find               graph2tree                      rosboost-cfg               rosmake         rosstack     rqt_image_view    view_frames
catkin_init_workspace     log2graph                       rosclean                   rosmaster       rostest      rqt_logger_level  xacro
catkin_make               opencv_annotation               rosconsole                 rosmsg          rostopic     rqt_plot
catkin_make_isolated      opencv_createsamples            roscore                    rosmsg-proto    rosunit      rqt_shell
catkin_test_results       opencv_interactive-calibration  roscreate-pkg              rosnode         roswtf       run_selftest
catkin_topological_order  opencv_traincascade             rosgraph                   rospack         rqt          rviz
compare_octrees           opencv_version                  roslaunch                  rosparam        rqt_bag      selftest_example
convert_octree            opencv_visualisation            roslaunch-complete         rosrun          rqt_console  selftest_rostest

which -a python的输出：

/home/brads/anaconda3/envs/ros2/bin/python
/usr/bin/python

python -c "import sys; print(sys.executable)"的输出：“ / usr / bin / python3”

env | grep "PYTHON"的输出

VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3.5
PYTHONPATH=/opt/ros/kinetic/lib/python2.7/dist-packages:/home/brads/anaconda3/envs/ros2/lib/python2.7/site-packages/
CONDA_PYTHON_EXE=/home/brads/anaconda3/bin/python

Answer 1

问题似乎是在conda之前安装的virtualenv_wrapper。我通过pip uninstall virtualenvwrapper删除了，我也在~/.profile中删除了对它的引用，然后重新登录

创建python 2.7 conda环境可设置python 3.5

1 个答案: