x = copy.copy(y) # make a shallow copy of y 浅拷贝,只拷贝父对象, 不拷贝父对象里的子对象 x = copy.deepcopy(y) # make a deep copy of y深拷贝,递归拷贝,拷贝对象及其子对象 For module specific errors, copy.Error is raised. The difference between shallow and deep copying is only releva...
In most cases, you don’t need to take extra steps to make your Python classes copyable. As long as they consist of built-in types that already handle copying correctly, Python’s copy module will be clever enough to make both shallow and deep copies of your custom objects straight away....
defcopy(x):"""Shallow copy operation on arbitrary Python objects.See the module's __doc__ string for more info."""# 获取要复制对象的类型cls=type(x)# 获取对象的copier,如果copier不为空则使用它进行复制,本质上来说copier是一个Function对象。copier=_copy_dispatch.get(cls)ifcopier:returncopier(...
首先查看拷贝模块(copy)发现: >>> help(copy) Help on module copy: NAME copy - Generic (shallow and deep) copying operations. DESCRIPTION Interface summary: import copy x = copy.copy(y) # make a shallow copy of y x = copy.deepcopy(y) # make a deep copy of y For module specific err...
# Multi-Worker setting.#TODO(omalleyt):Makethisattrpubliconce solution is stable.self._chief_worker_only=None self._supports_tf_logs=False defset_params(self,params):self.params=params defset_model(self,model):self.model=model @doc_controls.for_subclass_implementers ...
get_systeminfo.py' # Max times to retry get startup when no query result GET_STARTUP_INTERVAL = 15 # seconds MAX_TIMES_GET_STARTUP = 120 # Max times to retry # Max times to retry when download file faild MAX_TIMES_RETRY_DOWNLOAD = 3 class OPSConnection(object): """Make an OPS ...
深浅拷贝 有时候,尤其是当你在处理可变对象时,你可能想要复制一个对象,然后对其做出一些改变而不希望影响原来的对象。这就是Python的copy所发挥作用的地方。 定义了当对你的类的实例调用copy.copy()时所产生的行为。copy.copy()返回了你的对象的一个浅拷贝——这意味着,
In Python, thecopy()method creates and returns a shallow copy of an object, such as a list. Usingcopy()can be helpful for creating a new object with the same elements as the original object, while keeping the original object intact. This allows you to make changes to each object without...
# AnnData objectwithn_obs × n_vars=16934×36601#var:'gene_ids','feature_types','genome' 读取数据后,scanpy 会显示一条警告,指出并非所有变量名称都是唯一的。这表明某些var(=基因)出现多次,这可能会导致下游分析任务出现错误或意外行为。我们执行建议的函数var_names_make_unique(),通过将数字字符串附加...
# 1.打开文件 file_object = open('/Users/liuxiaowei/PycharmProjects/路飞全栈/day09/files/info.txt', mode='rt', encoding='utf-8') # 2.读取文件内容,并赋值给data data = file_object.read() # 3.关闭文件 file_object.close() 1. 2. 3. 4. 5. 6. windows系统中写绝对路径容易出问题: ...