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2020-02-08 01:31:01 -0500 marked best answer Unable to use rosrun

`

$ rosrun turtlesim
Usage: rosrun [--prefix cmd] [--debug] PACKAGE EXECUTABLE [ARGS] 
rosrun will locate PACKAGE and try to find
  an executable named EXECUTABLE in the PACKAGE tree.
  If it finds it, it will run it with ARGS.

I was also unable to use rosrun for locating executable in another package. Any suggestion on what could be the reason for this?

2020-02-06 10:08:13 -0500 answered a question Unable to use rosrun

Thanks for your answer. I see in a video lecture that rosrun work as listing the executables in the package when run w

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2020-02-03 22:23:57 -0500 asked a question Unable to use rosrun

Unable to use rosrun `$ rosrun turtlesim Usage: rosrun [--prefix cmd] [--debug] PACKAGE EXECUTABLE [ARGS] rosrun will l

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2019-12-27 23:26:55 -0500 asked a question Could not import "pyqt" bindings of qt_gui_cpp library

Could not import "pyqt" bindings of qt_gui_cpp library rosrun rqt_console rqt_console Could not import "pyqt" bindings o

2019-12-25 14:56:55 -0500 asked a question ModuleNotFoundError: No module named 'pydot'

ModuleNotFoundError: No module named 'pydot' On going through the sixth tutorial on "Understanding ROS Topics", I am get

2019-12-25 14:40:02 -0500 marked best answer catkin_make: No module named 'catkin_pkg'

I am getting the following error and is unable to remove the same.

#### Running command: "make cmake_check_build_system" in "/home/csio/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/csio/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/melodic
-- This workspace overlays: /opt/ros/melodic
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.6.8", minimum required is "2") 
-- 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/csio/catkin_ws/build/test_results
-- Found gtest sources under '/usr/src/googletest': gtests will be built
-- Found gmock sources under '/usr/src/googletest': gmock will be built
--Found PythonInterp: /usr/bin/python3 (found version "3.6.8") 
-- 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/melodic/share/catkin/cmake/safe_execute_process.cmake:11 (message):
  execute_process(/usr/bin/python3
  "/opt/ros/melodic/share/catkin/cmake/parse_package_xml.py"
  "/opt/ros/melodic/share/catkin/cmake/../package.xml"
  "/home/csio/catkin_ws/build/catkin/catkin_generated/version/package.cmake")
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/melodic/share/catkin/cmake/catkin_package_xml.cmake:74 (safe_execute_process)
  /opt/ros/melodic/share/catkin/cmake/all.cmake:168 (_catkin_package_xml)
  /opt/ros/melodic/share/catkin/cmake/catkinConfig.cmake:20 (include)
  CMakeLists.txt:56 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/csio/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/csio/catkin_ws/build/CMakeFiles/CMakeError.log".
Makefile:320: recipe for target 'cmake_check_build_system' failed
make: *** [cmake_check_build_system] Error 1
Invoking "make cmake_check_build_system" failed 
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2019-12-22 22:36:55 -0500 commented answer catkin_make: No module named 'catkin_pkg'

On running the above suggestion, I received this error: Could not install packages due to an EnvironmentError: [Errno 1

2019-12-22 22:36:42 -0500 commented answer catkin_make: No module named 'catkin_pkg'

How do I make sure that Catkin uses Python 2 interpreter? Is there a workaround?

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2019-12-21 17:04:53 -0500 asked a question catkin_make: No module named 'catkin_pkg'

Invoking "make cmake_check_build_system" failed I am getting the following error and is unable to remove the same. ###