创建Python2.7 conda环境将设置Python3.5

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：conda activate ros2

但是python --version给出了“python3.5.2”

为什么会这样？如何将python的版本设置为2.7？你知道吗

which python给出“/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:/home/brads/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/usr/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”

输出env | grep "PYTHON"

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

问题似乎是我在conda之前安装的virtualenv\u包装器。我通过pip uninstall virtualenvwrapper删除了对它的引用，也删除了~/.profile中对它的引用，然后重新登录