class MyClass:def __init__(self, value):self.value = valuedef __copy__(self):new_object = MyClass(self.value)return new_objectoriginal_object = MyClass(10)copied_object = copy.copy(original_object)d_copied_object = copy.deepcopy(original_object)print(original_object.value, copied_object...
importcopyclassMyClass:def__init__(self,value):self.value=valuedef__str__(self):returnf"MyClass object with value{self.value}"# 创建一个原始实例original_object=MyClass([1,2,3])# 深复制原始实例copied_object=copy.deepcopy(original_object)print(original_object)print(copied_object)# 修改原始...
浅拷贝(copy):拷贝父对象,不会拷贝对象的内部的子对象。即浅复制只复制对象本身,没有复制该对象所引用的对象。Ashallow copyconstructs a new compound object and then (to the extentpossible) insertsreferencesinto it to the objects found in the original. 深拷贝(deepcopy): copy 模块的 deepcopy 方法,完...
Memo dictionary:# Graph(name=root, id=4326183824): Graph(name=root, id=4367233208)# Copying to new object Graph(name=a, id=4367234720)## Calling __deepcopy__ for Graph(name=root, id=4326183824)# Already copied to Graph(name=root, id=4367233208)## Calling __deepcopy__ for Graph(name=...
deepcopy():是深复制,一个新容器,复制原列表的元素,然后将这些副本追加到新的列表中。 1、浅复制 copy_shallow.py 运行效果 my_list: [<__main__.MyClass object at 0x0000021F44E1ECC8>] dup: [<__main__.MyClass object at 0x0000021F44E1ECC8>] #这里的浅复制是指把内存地址指向该对象 ...
class TestClass(object): val1 = 100 #类变量 def __init__(self): self.val2 = 200 #成员变量 def change(obj): obj.val2 = 5555 obj.val1 = 6666 if __name__ == '__main__': inst0 = TestClass() print '$$$ ',inst0.val1 #100 ...
对象(Object)可以是抽象的概念或一个具体的东西,包括“数据”(Data)及其所相应的“操作”或“运算”(Operation),或称为方法(Method),它具有状态(State)、行为(Behavior)与标识(Identity)。 每一个对象均有其相应的属性(Attribute)及属性值(Attribute Value)。例如,有一个对象称为学生,“开学”是一条信息,可传送...
This brings us to inheritance, which is a fundamental aspect of object-oriented programming. 这就引出了继承,这是面向对象编程的一个基本方面。 Inheritance means that you can define a new object type, a new class, that inherits properties from an existing object type. 继承意味着您可以定义一个新...
[cls]10return_singleton1112@singleton13classMyClass4(object):14a=115def__init__(self,x=0):16self.x=x1718one=MyClass4()19two=MyClass4()2021two.a=322print one.a23#324printid(one)25#2966078426printid(two)27#2966078428print one==two29#True30print one is two31#True32one.x=133print ...
result = arcpy.CopyFeatures_management("roads", "urban_roads") # A print statement will display the string representation of the output. print(result) # A result object can be indexed to get the output value. Note: a result object # also has a getOutput() method that can be used for...