# Chapter7:how to build venv(python3) on local PC? **URL:** \ **Category:** Using OpenAI With ROS\ **Tags:** python3\ **Created:** [June 26, 2020, 8:52am UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184 "2020-06-26T08:52:39Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![798419633](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/798419633/32/10_2.png) [@798419633](https://get-help.theconstruct.ai/u/798419633)\ **Post date:** [June 26, 2020, 8:52am UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/1 "2020-06-26T08:52:40Z")
I’m trying to build venv(python3) on my local PC to run the openai baseline. [![](https://get-help.robotigniteacademy.com/uploads/default/original/2X/0/08b96d24a55a91559c6f0df8c19433eb0ed107d4.jpeg "ROS Developers LIVE Class #81: How to use ROS with Python3") ](https://www.youtube.com/watch?v=oxK4ykVh1EE) Although I have followed the live class ‘How to use ROS with Python3’ step by setp, after I have typed in ‘catkin\_make -DPYTHON\_EXECUTABLE:FILEPATH=/home/zxj/python3\_ws/py3venv/bin/python’. I got this message: CMake Error at /opt/ros/kinetic/share/catkin/cmake/catkin\_workspace.cmake:95 (message): This workspace contains non-catkin packages in it, and catkin cannot build a non-homogeneous workspace without isolation. Try the ‘catkin\_make\_isolated’ command instead. Call Stack (most recent call first): CMakeLists.txt:67 (catkin\_workspace) – Configuring incomplete, errors occurred! See also “/home/zxj/python3\_ws/build/CMakeFiles/CMakeOutput.log”. See also “/home/zxj/python3\_ws/build/CMakeFiles/CMakeError.log”. Invoking “cmake” failed And CMakeError.log 🙂collect2: error: ld returned 1 exit status CMakeFiles/cmTC\_3d131.dir/build.make:97: recipe for target ‘cmTC\_3d131’ failed make[1]: \*\*\* [cmTC\_3d131] Error 1 make[1]: Leaving directory ‘/home/zxj/python3\_ws/build/CMakeFiles/CMakeTmp’ Makefile:126: recipe for target ‘cmTC\_3d131/fast’ failed make: \*\*\* [cmTC\_3d131/fast] Error 2 I am very confused about the result. Would you like to tell me what’s wrong in that? Thank you! ---
**Author:** ![simon.steinmann91](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/simon.steinmann91/32/324_2.png) [@simon.steinmann91](https://get-help.theconstruct.ai/u/simon.steinmann91)\ **Post date:** [June 26, 2020, 2:46pm UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/2 "2020-06-26T14:46:23Z")
@rtellez can you tak a look? ---
**Author:** ![798419633](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/798419633/32/10_2.png) [@798419633](https://get-help.theconstruct.ai/u/798419633)\ **Post date:** [June 27, 2020, 2:28pm UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/3 "2020-06-27T14:28:31Z")
Hello, thanks for your attention. I still haven’t solved the problem. And Would you like to tell me that has anyone ever tried the openai\_ros package on the ROS Noetic? ---
**Author:** ![798419633](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/798419633/32/10_2.png) [@798419633](https://get-help.theconstruct.ai/u/798419633)\ **Post date:** [June 27, 2020, 2:38pm UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/4 "2020-06-27T14:38:43Z")
sudo apt-get install python-catkin-tools python3-dev python3-numpy sudo pip install virtualenv mkdir -p python3\_ws/src cd python3\_ws virtualenv py3venv --python=python3 source ~/python3\_ws/py3venv/bin/activate cd ~/python3\_ws/src/ git clone [https://github.com/ros/geometry](https://github.com/ros/geometry) git clone [https://github.com/ros/geometry2](https://github.com/ros/geometry2) pip install pyaml rospkg empy catkin\_pkg numpy cd ~/python3\_ws catkin\_make -DPYTHON\_EXECUTABLE:FILEPATH=/home/zxj/python3\_ws/py3venv/bin/python and then CMake Error at /opt/ros/kinetic/share/catkin/cmake/catkin\_workspace.cmake:95 (message): This workspace contains non-catkin packages in it, and catkin cannot build a non-homogeneous workspace without isolation. Try the ‘catkin\_make\_isolated’ command instead. Call Stack (most recent call first): CMakeLists.txt:67 (catkin\_workspace) – Configuring incomplete, errors occurred! See also “/home/zxj/python3\_ws/build/CMakeFiles/CMakeOutput.log”. See also “/home/zxj/python3\_ws/build/CMakeFiles/CMakeError.log”. Invoking “cmake” failed ---
**Author:** ![commando4301](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/commando4301/32/10_2.png) [@commando4301](https://get-help.theconstruct.ai/u/commando4301)\ **Post date:** [September 5, 2020, 3:04pm UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/5 "2020-09-05T15:04:02Z")
I am aslo having the same problem here, did you get any luck with it? ---
**Author:** ![ncbdrck](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/n/7bcc69/32.png) [@ncbdrck](https://get-help.theconstruct.ai/u/ncbdrck)\ **Post date:** [June 17, 2021, 6:14pm UTC](https://get-help.theconstruct.ai/t/chapter7-how-to-build-venv-python3-on-local-pc/4184/6 "2021-06-17T18:14:50Z")
I think you need to install dependencies. try ``` cd ~/python3_ws/ rosdep install --from-paths src --ignore-src -r -y catkin_make source devel/setup.bash ```