go gin框架调用cmd运行python脚本问题

报错1：exec: “python3 test.py”: executable file not found in $PATH

在单个go程序中直接执行以下脚本没有问题

func TestCmdPython(t *testing.T) {
    //test.txt的内容为图片的base64字符串
    //filePath := "test.txt"
    //newFileName := "test.jpg"
    //CmdPythonSaveImageDpi(filePath,newFileName)
    cmd := exec.Command("python3 test.py")
    //cmd.Dir, _ = os.Getwd()
    fmt.Println("cmd.Path:",cmd.Path)
    fmt.Println("cmd.Dir:",cmd.Dir)
    //out,err := cmd.Output()
}