samples: update Python launcher (winpack)

samples/_winpack_run_python_sample.cmd

+@ECHO OFF
+SETLOCAL
+
+SET SCRIPT_DIR=%~dp0
+IF NOT EXIST "%SCRIPT_DIR%\..\..\build\setup_vars_opencv3.cmd" (
+  ECHO ERROR: OpenCV Winpack installation is required
+  pause
+  exit
+)
+
+:: Detect Python binary
+python -V 2>nul
+IF %ERRORLEVEL% EQU 0 (
+  SET PYTHON=python
+  GOTO :PYTHON_FOUND
+)
+
+CALL :QUERY_PYTHON 3.7
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
+CALL :QUERY_PYTHON 3.6
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
+CALL :QUERY_PYTHON 3.5
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
+CALL :QUERY_PYTHON 3.4
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
+CALL :QUERY_PYTHON 2.7
+IF %ERRORLEVEL% EQU 0 GOTO :PYTHON_FOUND
+GOTO :PYTHON_NOT_FOUND
+
+:QUERY_PYTHON
+SETLOCAL
+SET PY_VERSION=%1
+FOR /F "tokens=2*" %%A IN ('REG QUERY "HKCU\SOFTWARE\Python\PythonCore\%PY_VERSION%\InstallPath" /reg:64 /ve 2^>NUL ^| FIND "REG_SZ"') DO SET PYTHON_DIR=%%B
+IF EXIST "%PYTHON_DIR%\python.exe" (
+  SET "PYTHON=%PYTHON_DIR%\python.exe"
+  GOTO :QUERY_PYTHON_FOUND
+)
+FOR /F "tokens=2*" %%A IN ('REG QUERY "HKLM\SOFTWARE\Python\PythonCore\%PY_VERSION%\InstallPath" /reg:64 /ve 2^>NUL ^| FIND "REG_SZ"') DO SET PYTHON_DIR=%%B
+IF EXIST "%PYTHON_DIR%\python.exe" (
+  SET "PYTHON=%PYTHON_DIR%\python.exe"
+  GOTO :QUERY_PYTHON_FOUND
+)
+
+::echo Python %PY_VERSION% is not detected
+ENDLOCAL
+EXIT /B 1
+
+:QUERY_PYTHON_FOUND
+ECHO Found Python %PY_VERSION% from Windows Registry
+ENDLOCAL & SET PYTHON=%PYTHON%
+EXIT /B 0
+
+IF exist C:\Python27-x64\python.exe (
+  SET PYTHON=C:\Python27-x64\python.exe
+  GOTO :PYTHON_FOUND
+)
+IF exist C:\Python27\python.exe (
+  SET PYTHON=C:\Python27\python.exe
+  GOTO :PYTHON_FOUND
+)
+
+:PYTHON_NOT_FOUND
+ECHO ERROR: Python not found
+IF NOT DEFINED OPENCV_BATCH_MODE ( pause )
+EXIT /B
+
+:PYTHON_FOUND
+ECHO Using Python: %PYTHON%
+
+:: Don't generate unnecessary .pyc cache files
+SET PYTHONDONTWRITEBYTECODE=1
+
+IF [%1]==[] goto rundemo
+
+set SRC_FILENAME=%~dpnx1
+echo SRC_FILENAME=%SRC_FILENAME%
+call :dirname "%SRC_FILENAME%" SRC_DIR
+call :dirname "%PYTHON%" PYTHON_DIR
+PUSHD %SRC_DIR%
+CALL "%SCRIPT_DIR%\..\..\build\setup_vars_opencv3.cmd"
+ECHO Run: %*
+%PYTHON% %*
+SET result=%errorlevel%
+IF %result% NEQ 0 (
+  IF NOT DEFINED OPENCV_BATCH_MODE (
+    SET "PATH=%PYTHON_DIR%;%PATH%"
+    echo ================================================================================
+    echo **  Type 'python sample_name.py' to run sample
+    echo **  Type 'exit' to exit from interactive shell and open the build directory
+    echo ================================================================================
+    cmd /k echo Current directory: %CD%
+  )
+)
+POPD
+EXIT /B %result%
+
+:rundemo
+PUSHD "%SCRIPT_DIR%\python"
+CALL "%SCRIPT_DIR%\..\..\build\setup_vars_opencv3.cmd"
+%PYTHON% demo.py
+SET result=%errorlevel%
+IF %result% NEQ 0 (
+  IF NOT DEFINED OPENCV_BATCH_MODE ( pause )
+)
+POPD
+EXIT /B %result%
+
+
+:dirname file resultVar
+  setlocal
+  set _dir=%~dp1
+  set _dir=%_dir:~0,-1%
+  endlocal & set %2=%_dir%
+  EXIT /B 0

samples/python/_run_winpack_demo.cmd

+@echo off
+call ..\_winpack_run_python_sample.cmd %*
+exit /B

samples/python/_run_winpack_demo_python27.cmd

-@echo off
-setlocal enableDelayedExpansion
-
-set SCRIPTDIR=%~dp0
-if NOT exist %SCRIPTDIR%\..\..\..\build (
-  echo ERROR: OpenCV Winpack installation is required
-  pause
-  exit
-)
-
-:: Path to FFMPEG binary files
-set PATH=%PATH%;%SCRIPTDIR%\..\..\..\build\bin\
-
-:: Detect Python binary
-python -V
-if %ERRORLEVEL% EQU 0 (
-  set PYTHON=python
-) else (
-  if exist C:\Python27-x64\python.exe (
-    set PYTHON=C:\Python27-x64\python.exe
-  ) else (
-    if exist C:\Python27\python.exe (
-      set PYTHON=C:\Python27\python.exe
-    ) else (
-      echo ERROR: Python not found
-      pause
-      exit
-    )
-  )
-)
-echo Using python: %PYTHON%
-
-:: Detect python architecture
-%PYTHON% -c "import platform; exit(64 if platform.architecture()[0] == '64bit' else 32)"
-if %ERRORLEVEL% EQU 32 (
-  echo Detected: Python 32-bit
-  set PYTHONPATH=%CD%\..\..\..\build\python\2.7\x86
-) else (
-  if %ERRORLEVEL% EQU 64 (
-    echo Detected: Python 64-bit
-    set PYTHONPATH=%CD%\..\..\..\build\python\2.7\x64
-  ) else (
-    echo ERROR: Unknown python arch
-    pause
-    exit
-  )
-)
-
-:: Don't generate unnecessary .pyc cache files
-set PYTHONDONTWRITEBYTECODE=1
-
-if [%1]==[] goto rundemo
-%PYTHON% %*
-set result=%errorlevel%
-IF %result% NEQ 0 (pause)
-EXIT /B %result%
-
-:rundemo
-%PYTHON% demo.py
-set result=%errorlevel%
-IF %result% NEQ 0 (pause)
-EXIT /B %result%