尝试在 ROS 中创建 catkin 工作区时出现 CMake 错误，因为它找不到 PythonInterp

Posted 2023-02-16

【中文标题】尝试在 ROS 中创建 catkin 工作区时出现 CMake 错误，因为它找不到 PythonInterp

【英文标题】：Getting a CMake Error trying to create a catkin workspace in ROS, because it could not find the PythonInterp

【发布时间】：2019-12-04 02:41:08

【问题描述】：

我在尝试在 ROS 中创建 catkin 工作区时遇到 CMake 错误，因为它找不到 PythonInterp。它发现了一个不合适的版本“1.4”，但它至少需要有2个。但是，我已经为ros下载了更高版本的python。

这是我运行 catkin_make 时得到的结果

nasa@nasa-VirtualBox:~/catkin_ws$ catkin_make
Base path: /home/nasa/catkin_ws
Source space: /home/nasa/catkin_ws/src
Build space: /home/nasa/catkin_ws/build
Devel space: /home/nasa/catkin_ws/devel
Install space: /home/nasa/catkin_ws/install
####
#### Running command: "make cmake_check_build_system" in "/home/nasa/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/nasa/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/melodic
-- This workspace overlays: /opt/ros/melodic
CMake Error at /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find PythonInterp: Found unsuitable version "1.4", but required
  is at least "2" (found /home/nasa/catkin_ws/build/python3)
Call Stack (most recent call first):
  /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:376 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.10/Modules/FindPythonInterp.cmake:152 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  /opt/ros/melodic/share/catkin/cmake/python.cmake:4 (find_package)
  /opt/ros/melodic/share/catkin/cmake/all.cmake:163 (include)
  /opt/ros/melodic/share/catkin/cmake/catkinConfig.cmake:20 (include)
  CMakeLists.txt:56 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/nasa/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/nasa/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

【参考方案1】：

解决方案可能是清理您的工作区。正如the first link in google after searching for the error 所暗示的那样，问题出在 CMakeCache.txt 上。根据您使用的是catkin build 还是catkin_make，您可以在catkin 工作区中运行catkin clean 或catkin_make clean。只需删除工作区中的 devel 和 build 文件夹也应该适用于任何一个构建系统。

您还可以在 https://answers.ros.org/questions/ 上获得有关 ROS 相关问题的更快答案

如果清理工作区不能解决问题，请检查终端python --version 报告的python 版本。此外，如果您安装了新版本的 python 并从同一个终端尝试构建工作区，那么相关的环境路径可能尚未在该 shell 中更新。运行exec bash 或启动一个新终端并尝试构建您的工作区。

【参考方案2】：

使用命令$python -V查看python的版本。

如果版本是 2.7，那么：

转到 catkin_ws 删除文件夹 devel 并重新构建 在工作区中打开另一个终端，然后重试。