-- Found PythonInterp: C:/Python-3.9/python.exe (found suitable version "3.9", 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:/Python-3.9/python.exe

  PYTHON_VERSION_STRING=3.9

  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:660 (include)


-- Could NOT find Python2 (missing: Python2_EXECUTABLE Interpreter) 
    Reason given by package: 
        Interpreter: Wrong major version for the interpreter "C:/Python-3.9/python.exe"