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catkin_make: no module named catkin_pkg

asked 2019-11-08 01:54:47 -0600

YUMA gravatar image

updated 2019-11-08 03:49:49 -0600

gvdhoorn gravatar image

I don't understand catkin_make. I want to install ROS and move to robot.

Install finished. How to install

http://wiki.ros.org/kinetic/Installat...

I referred to it. http://wiki.ros.org/ROS/Tutorials/Ins...

3.Create a ROS Workspace

Fail at the beginning of Chapter 3 create and build a catkin workspace:

Please,show me how to good idea

environment Ubuntu16.0.4 windows10 Hyper-V

error

~/catkin_ws$ catkin_make
Base path: /home/yuma/catkin_ws
Source space: /home/yuma/catkin_ws/src
Build space: /home/yuma/catkin_ws/build
Devel space: /home/yuma/catkin_ws/devel
Install space: /home/yuma/catkin_ws/install
####
#### Running command: "cmake /home/yuma/catkin_ws/src -DCATKIN_DEVEL_PREFIX=/home/yuma/catkin_ws/devel -DCMAKE_INSTALL_PREFIX=/home/yuma/catkin_ws/install -G Unix Makefiles" in "/home/yuma/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/yuma/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/kinetic
-- This workspace overlays: /opt/ros/kinetic
-- Using PYTHON_EXECUTABLE: /usr/bin/python3
-- Using Debian Python package layout
-- Using empy: /usr/bin/empy
-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /home/yuma/catkin_ws/build/test_results
-- Found gmock sources under '/usr/src/gmock': gmock will be built
-- Found gtest sources under '/usr/src/gmock': gtests will be built
-- Using Python nosetests: /usr/bin/nosetests-2.7
ImportError: "from catkin_pkg.package import parse_package" failed: No module named 'catkin_pkg'
Make sure that you have installed "catkin_pkg", it is up to date and on the PYTHONPATH.
CMake Error at /opt/ros/kinetic/share/catkin/cmake/safe_execute_process.cmake:11 (message):
  execute_process(/usr/bin/python3
  "/opt/ros/kinetic/share/catkin/cmake/parse_package_xml.py"
  "/opt/ros/kinetic/share/catkin/cmake/../package.xml"
  "/home/yuma/catkin_ws/build/catkin/catkin_generated/version/package.cmake")
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/kinetic/share/catkin/cmake/catkin_package_xml.cmake:74 (safe_execute_process)
  /opt/ros/kinetic/share/catkin/cmake/all.cmake:167 (_catkin_package_xml)
  /opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:20 (include)
  CMakeLists.txt:56 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/yuma/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/yuma/catkin_ws/build/CMakeFiles/CMakeError.log".
Invoking "cmake" failed
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answered 2019-11-08 03:49:32 -0600

gvdhoorn gravatar image

updated 2019-11-08 03:50:16 -0600

The problem is most likely this:

-- Using PYTHON_EXECUTABLE: /usr/bin/python3

ROS Python packages (or really: Debian/Ubuntu Python packages) are only installed for the default system-provided Python interpreter, which would be Python 2 on Ubuntu Xenial.

As Catkin (or really: CMake) detects Python 3 as the default interpreter, and catkin_pkg is not installed for that version, you get the error message you show.

You'll need to either install catkin_pkg for Python 3 (sudo apt install python3-catkin-pkg) or make the default system-interpreter Python 2 again or override which version of Python Catkin/CMake uses by setting -DPYTHON_VERSION=3.5 when invoking catkin_make.

If you require further information or assistance, I'd recommend searching this forum for Python 3 related problems with Catkin (or any of the ROS 1 packages) as there have been quite a nr of posts about that (use Google: no module named site:answers.ros.org).

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Thank you,answered !! Does that mean writing the override code before writing the error code?

YUMA gravatar imageYUMA ( 2019-11-10 18:26:32 -0600 )edit

Does that mean writing the override code before writing the error code?

I don't know what you mean by that.

gvdhoorn gravatar imagegvdhoorn ( 2019-11-11 01:24:10 -0600 )edit

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Asked: 2019-11-08 01:54:47 -0600

Seen: 27 times

Last updated: Nov 08