如何使用Cmake使用python 3而不是python 2构建opencv

我正在使用

cmake3.17.3-GUI

在

windows10-vs2015

环境中构建

opencv4.3.0

。Python2.7和3.7都安装在我的电脑中

配置CMake将显示警告消息：

Found PythonInterp: C:/Python37/python.exe (found suitable version "3.7.7", minimum required is "2.7") 
CMake Warning at cmake/OpenCVDetectPython.cmake:81 (message):
  CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version:

  PYTHON_EXECUTABLE=C:/Python37/python.exe

  PYTHON_VERSION_STRING=3.7.7

  Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line
  or environment variables

Call Stack (most recent call first):
  cmake/OpenCVDetectPython.cmake:271 (find_python)
  CMakeLists.txt:598 (include)

它还表明：

  Python 2:
    Interpreter:                 C:/Python27/ArcGIS10.7/python.exe (ver 2.7.16)
    Libraries:                   C:/Python27/ArcGIS10.7/libs/python27.lib (ver 2.7.16)
    numpy:                       C:/Python27/ArcGIS10.7/lib/site-packages/numpy/core/include (ver 1.9.3)
    install path:                C:/Python27/ArcGIS10.7/Lib/site-packages/cv2/python-2.7

  Python 3:
    Interpreter:                 C:/Python37/python.exe (ver 3.7.7)
    Libraries:                   C:/Python37/libs/python37.lib (ver 3.7.7)
    numpy:                       C:/Python37/lib/site-packages/numpy/core/include (ver 1.18.5)
    install path:                C:/Python37/Lib/site-packages/cv2/python-3.7

  Python (for build):            C:/Python27/ArcGIS10.7/python.exe

以下是关于CMake界面中python设置的屏幕截图：

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如何强制Cmake使用PYTHON3.7进行构建？

看起来使用可选的Python组件进行构建最好是通过将几个

PYTHON3.*

变量传递给Cmake，如图所示。你能提供你传递给CMake的变量列表，或者显示你在CMake GUI中定义的变量列表吗？我更新了帖子。python配置由CMAKE自动设置，这是否回答了您的问题？看起来使用可选Python组件进行构建的最佳方法是将几个

PYTHON3.*

变量传递给CMake，如图所示。你能提供你传递给CMake的变量列表，或者显示你在CMake GUI中定义的变量列表吗？我更新了帖子。python配置由CMAKE自动设置，这是否回答了您的问题？