目录数字运算类型转换数学库math、cmath随机函数库 random数字运算 =：用于给变量赋值type(x)：查看数据所属类型isinstance(x, A_tuplwww.devze.come)：判断数据是否为预期类型+：两个数相加-：两个数相减*：两个数相
I have 2 windows one is the header [mainWindow] (-setMovableByWindowBackground:YES) and the other is the content [secWindow], child of the header, the header have a button to hide the content.
加载中,请稍侯......