start subprocess in gradio demo

Author: cpunion

README.md

@@ -232,6 +232,7 @@ point.print()
 package main
 
 import (
+	"fmt"
 	"os"
 
 	. "github.com/cpunion/go-python"
@@ -273,8 +274,9 @@ func updateExamples(country string) Object {
 
 func main() {
 	if len(os.Args) > 2 {
-		// avoid gradio start subprocesses
-		return
+		// start subprocesses
+		fmt.Println("start subprocess:", os.Args)
+		os.Exit(RunMain(os.Args))
 	}
 
 	Initialize()

demo/gradio/gradio.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	. "github.com/cpunion/go-python"
@@ -42,8 +43,9 @@ func updateExamples(country string) Object {
 
 func main() {
 	if len(os.Args) > 2 {
-		// avoid gradio start subprocesses
-		return
+		// start subprocesses
+		fmt.Println("start subprocess:", os.Args)
+		os.Exit(RunMain(os.Args))
 	}
 
 	Initialize()

python.go

@@ -111,6 +111,15 @@ func RunString(code string) error {
 	return nil
 }
 
+func RunMain(args []string) int {
+	argc := len(args)
+	argv := make([]*C.char, argc+1)
+	for i, arg := range args {
+		argv[i] = AllocCStr(arg)
+	}
+	return int(C.Py_BytesMain(C.int(argc), &argv[0]))
+}
+
 // ----------------------------------------------------------------------------
 
 func check(b bool, msg string) {