Python自定义一个数组类，支持数组之间的四则运算和其他常见方法

class MyArray:    ‘‘‘保证输入的内容是整型、浮点型‘‘‘    def ___isNumber(self, num):        if not isinstance(num, (int,float)):            return False        return True

    #开始写构造函数,接受可变长度的数组    def __init__(self, *args):        if args == None:            self.__value = []        else:            for a in args:                if not self.___isNumber(a):                    print(‘All elements must be number!‘)            #self.__value 是一个数组            self.__value = list(args)

    #打印输出当前的self.__value    def printSelf(self):        #这个self是一个地址        print(self)        #这个self.__value是一个数组        print(self.__value)

    #重载len(Array)这个方法    def __len__(self):        return len(self.__value)

     #append方法    def append(self, other):        self.__value.append(other)        #注意：此处不能够直接return self.__value.append(other)        #这个方法执行后没有返回值        return self.__value

    #重载运算符+    def __add__(self,other):        if self.___isNumber(other):            #如果other 是一个数，则数组里每一个元素都加上other            array = MyArray()            array.__value = [ i + other for i in self.__value]            return array.__value        elif isinstance(other,MyArray):            #如果other 是一个数组，则两个数组对应位置的数相加            if (len(self.__value) == len(other.__value)):                array = MyArray()                array.__value = [i+j for i,j in zip(self.__value,other.__value)]                return array.__value            else:                print(‘The size must be equal!‘)        else:            print(‘Please input a array or a num!‘)

    #重载运算符 / 浮点数除法，返回浮点数    def __truediv__(self,other):        if self.___isNumber(other):            if other == 0:                print("Zero cant be this number!")                return             array = MyArray()            array.__value = [i / other for i in self.__value]            return array.__value        else:            print("It is must be a number except zero!")

    #重载运算符 // 整数除法，返回不大于结果的最大的一个整数    def __floordiv__(self,other):        if isinstance(other,int):            if other == 0:                print("Zero cant be this number!")                return            array = MyArray()            array.__value = [i // other for i in self.__value]            return array.__value        else:            print("Tt is must be a number except zero!")

    #重载运算符% 取余数    def __mod__(self,other):        if isinstance(other,int):            if other == 0:                print("Zero cant be this number!")                return            array = MyArray()            array.__value = [i % other for i in self.__value]            return array.__value        else:            print("Tt is must be a number!")

    #根据数组index查看元素    def __getitem__(self,index):        arrayLength = len(self.__value)        if isinstance(index,int) and (0 <= index <= arrayLength):            return self.__value[index]        else:            print("Index must be a Inteager which is less than", arrayLength-1)

    #查看元素是否在该列表    def __contains__(self,other):        if other in self.__value:            return True        return False

    #数组比较    def __lt__(self,other):        if not isinstance(other,MyArray):            print("It is must be the type of MyArray")            return False        if self.__value < other.__value:            return True        return False

原文地址：https://www.cnblogs.com/motorye/p/10891035.html