__init__()方法用于初始化MyClass的实例，将value属性设置为给定值。__copy__()方法用于创建一个MyClass的新实例，即拷贝原始实例，这里直接返回了一个新的MyClass实例，其中value属性的值与原始实例相同。
other):returnself.name==other.namedef__gt__(self,other):returnself.name>other.namedef__copy__(self):print('__copy__()')returnMyClass(self.name)def__deepcopy__(self,memo):print('__deepcopy__({})'.format(memo))returnMyClass(copy.deepcopy(self.name,memo))a=MyClass('a')sc=copy...
def__eq__(self,other):returnself.name==other.name def__gt__(self,other):returnself.name>other.name def__copy__(self):print('__copy__()')returnMyClass(self.name)def__deepcopy__(self,memo):print('__deepcopy__({})'.format(memo))returnMyClass(copy.deepcopy(self.name,memo))a=...
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,完全拷贝了父对象及其子对象。即创建一个新的组合对象,同时递归地拷贝所有子对象,新的组合对象与原对象没有任何关...
a={1:{1,2,3}} b=aprint(aisb)print(a ==b ) 运行结果: True True b = a: 赋值引用,a 和 b 都指向同一个对象。 浅拷贝 importcopyimportfunctools @functools.total_orderingclassMyClass:def__init__(self, name): self.name=namedef__eq__(self, other):returnself.name ==other.namedef_...
您可以通过定义Python类并创建类的实例来创建自定义对象。 以下是从Book类创建一个简单对象的示例: classBook:def__init__(self, title, authors, price):self.title = titleself.authors = authorsself.price = price def__str__(self):returnf"Book(title='{self.title}', author='{self.authors}', \...
Source File: images.py From python-dlpy with Apache License 2.0 5 votes def copy_table(self, casout=None): ''' Create a copy of the ImageTable Parameters --- casout : dict, optional Output CAS table parameters Returns --- :class:`ImageTable` ''' if casout is None: casout = ...
For a shallow copy, the MyClass instance is not duplicated so the reference in the dup list is to the same object that is in the l list. $ python copy_shallow.py l : [<__main__.MyClass instance at 0x100467d88>] dup: [<__main__.MyClass instance at 0x100467d88>] ...
Python's deep copy operation avoids these problems by: a) keeping a table of objects already copied during the current copying pass b) letting user-defined classes override the copying operation or the set of components copied This version does not copy types like module, class, function, metho...
通过对自定义class的object测试发现,浅拷贝只是对List中对象的引用的拷贝,深拷贝则按照对象进行完整拷贝。 思路一:利用切片操作和工厂方法list方法拷贝就叫浅拷贝,只是拷贝了最外围的对象本身,内部的元素都只是拷贝了一个引用而已。 思路二:利用copy中的deepcopy方法进行拷贝就叫做深拷贝,外围和内部元素都进行了拷贝对象...