[Scripts] setupvars.bat: Added logic for passing '-pyver' option (#4026)

* setupvars.bat: Added logic for passing '-pyver' option as we already have in Linux* setupvars

* setupvars.bat: Fixed python_version name in echo

scripts/setupvars/setupvars.bat

@@ -14,13 +14,27 @@
 :: See the License for the specific language governing permissions and
 :: limitations under the License.
 
+setlocal enableDelayedExpansion
+
 set ROOT=%~dp0
 call :GetFullPath "%ROOT%\.." ROOT
 set SCRIPT_NAME=%~nx0
 
 set "INTEL_OPENVINO_DIR=%ROOT%"
 set "INTEL_CVSDK_DIR=%INTEL_OPENVINO_DIR%"
 
+:: command line arguments parsing
+:input_arguments_loop
+if not "%1"=="" (
+    if "%1"=="-pyver" (
+        set python_version=%2
+        echo python_version = !python_version!
+        shift
+    )
+    shift
+    goto :input_arguments_loop
+)
+
 :: OpenCV
 if exist "%INTEL_OPENVINO_DIR%\opencv\setupvars.bat" (
 call "%INTEL_OPENVINO_DIR%\opencv\setupvars.bat"
@@ -68,14 +82,16 @@ if errorlevel 1 (
    exit /B 1
 )
 
-:: Check Python version
-for /F "tokens=* USEBACKQ" %%F IN (`python --version 2^>^&1`) DO (
-   set pyversion=%%F
+:: Check Python version if user did not pass -pyver
+if not defined python_version (
+    for /F "tokens=* USEBACKQ" %%F IN (`python -c "import sys; print(str(sys.version_info[0])+'.'+str(sys.version_info[1]))"`) DO (
+       set python_version=%%F
+    )
 )
 
-for /F "tokens=1,2,3 delims=. " %%a in ("%pyversion%") do (
-   set pyversion_major=%%b
-   set pyversion_minor=%%c
+for /F "tokens=1,2 delims=. " %%a in ("%python_version%") do (
+   set pyversion_major=%%a
+   set pyversion_minor=%%b
 )
 
 if "%pyversion_major%" geq "3" (