8、类型转换、深浅拷贝8.1数据转换数据类型int整型float浮点数bool布尔值complex复数str字符串list列表tuple元组dict字典set集合python类型转换int()numint("123")ifnum123:print("等于123")num123nstr(num)

MySQL(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fc.biancheng.net%2Fmysql%2F) ROUND(x)函数返回最接近于参数x的整数；ROUND(x,y)函数对参数x进行四舍五入的操作，返回值保留小数点后面指定的y位。【实例1】使用ROUN

Python中的‘lambda’关键字提供了一个便捷的途径去声明短小并匿名的函数。ThelambdakeywordinPythonprovidesashortcutfordeclaringsmallandanonymousfunctions:addlambd

/获取某个元素下标arrays:传入的数组obj:需要获取下标的元素/functioncontains(arrays,obj){variarrays.length;w

//Util.jsfunctionabs(x){returnx0?x:x;}functionadd(a,b){returnab;}functionsub(a,b){returnab;}functionmul(a,b){returnab;}function

 有如下一个简单的复数类：classClxComplex{public:ClxComplex(doubledReal0.0,doubledImage0.0){m_dRealdReal;dImagedImage;}doubleGetReal(

packagemainimport("bytes""fmt""reflect""strings")funcmain(){sentence:byte("TheGolanguagehasbuiltinfac

通过在service的相关函数中打印线程ID，代码如下：classProgressBarServiceextendsService<Integer{@Overrideprotectedvoidready(){super.ready();System._out_.println("ProgressBarS

不是我写的太麻烦了转自：https://www.cnblogs.com/nanshouyong326/archive/2009/06/30/1513920.html(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fwww.cnblogs.com%2Fnanshouyong326%

NumPy概览：使用numpy.sinh(),numpy.cosh(),numpy.tanh()计算双曲函数；示例包括求弧度值的双曲正弦、余弦。此外，numpy.arcsinh(),numpy.arccosh(),numpy.arctanh()用于求反函数。同时，NumPy提供集合操作如numpy.unique()构建唯一元素数组，numpy.union1d()求并集，numpy.intersect1d()求交集，numpy.setdiff1d()求差集，numpy.setxor1d()求对称差。