修复指数判断不全的问题

example/Codes2/main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"fmt"
+	"strings"
+
 	"github.com/injoyai/logs"
 	"github.com/injoyai/tdx"
 )
@@ -13,4 +15,11 @@ func main() {
 	c := cs.Get("sz000001")
 
 	fmt.Println(c.FloatStock, c.TotalStock)
+
+	for _, v := range cs.GetIndexes().Codes() {
+		if strings.HasPrefix(v, "sz") {
+			logs.Debug(v)
+		}
+	}
+
 }