目录引言：条件判断为何如此重要一、基础语法：三行代码构建决策系统二、多条件分支：elif的魔法三、嵌套判断：处理复杂逻辑四、逻辑运算符：组合条件的利器五、短路求值：性能优化技巧六、三元表达式：一行代码的
I am using g_object_set_data to set user name with event_box so in call back i can get it with in event_box pointer.
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