improve error messages

backend-golang/rwkv.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"runtime"
 	"strconv"
 	"strings"
@@ -51,6 +52,10 @@ func (a *App) InstallPyDep(python string, cnMirror bool) (string, error) {
 	if python == "" {
 		python, err = GetPython()
 		if runtime.GOOS == "windows" {
+			python, err = filepath.Abs(python)
+			if err != nil {
+				return "", err
+			}
 			python = `"` + python + `"`
 		}
 	}