The string must be the name of one of the object's attributes. The function deletes the named attribute, provided the object allows it. For example, delattr(x, 'foobar') is equivalent to del x.foobar.说明: 定义类 #coding=utf-8 # class_my.py 定义类 (新式类) # 定义类 class Person...
-4,0,4,8]>>># filter the list to exclude negative numbers>>>[xforxinvecifx>=0][0,2,4]>>># apply afunctionto all the elements>>>[abs(x)forxinvec][4,2,0,2,4]>>># call a method on each element>>>freshfruit=[' banana',' loganberry ','passion fruit ']>...
在Python中,每个对象都有指向该对象的引用总数---引用计数 Whenever you create an object in Python, the underlying C object (CPython) has both a Python type (such as list, dict, or function) and a reference count. 在Python中每一个对象的核心就是一个结构体PyObject,它的内部有一个引用计数器(...
function, to get the value of an attribute The hasattr() function, to check if an attribute existThe setattr() function, to set the value of an attribute❮ Built-in Functions Track your progress - it's free! Log in Sign Up COLOR...
The string must be the name of one of the object’s attributes. The function deletes the named attribute, provided the object allows it. For example,delattr(x,'foobar')is equivalent todelx.foobar. 说明: 1. 函数作用用来删除指定对象的指定名称的属性,和setattr函数作用相反。 #定义类A >>>...
元类:元类就是帮你创建类的‘家伙‘,在python中, 类也是对象,这样的对象就是通过袁磊创建的, 元类就是‘类的类’。之前提到的type实际上就是元类, 在python中所有的类都是用type创建的。到此我们也能够立即为什么说在python中一切皆对象了吧,int,string,function,以及class ...
Python内置函数(14)——delattr 英文文档: delattr(object,name) This is a relative ofsetattr(). The arguments are an object and a string. The string must be the name of one of the object’s attributes. The function deletes the named attribute, provided the object allows it. For example,...
Python3.6内置函数(14)——delattr() 英文文档 delattr(object, name) This is a relative of setattr(). The arguments are an object and a string. The string must be the name of one of the object’s attributes. The function deletes the named attribute, provided the object allows it. For ...
The function deletes the named attribute, provided the object allows it. For example, delattr(x, 'foobar') is equivalent to del x.foobar. 与setattr()相关的一组函数。参数是由一个对象(记住python中一切皆是对象)和一个字符串组成的。string参数必须是对象属性名之一。该函数删除该obj的一个由string...
Python delattr() function: Compile the source into a code or AST object. Code objects can be executed by exec() or eval(). source can either be a string or an AST object. Refer to the ast module documentation for information on how to work with AST objec