classuser2:__name='Jason'defgetName(self):returnself.__name u2=user2()printu2.getName()#print u2.__name #AttributeError: user2 instance has no attribute '__name' 1.2.2、方法: 类中定义方法,同样使用def关键字,类中的方法至少有一个参数,一般以'self'的变量作为该参数,而且需要作为第一个参...
self.ins_attr = ins_attrif__name__ =='__main__': obj1 = MyClass("I am an instance attribute of obj1") obj2 = MyClass("I am an instance attribute of obj2")print(obj1.class_attr)# 输出 "I am a class attribute"print(obj2.class_attr)# 输出 "I am a class attribute"print(...
print(greet.__name__) print(greet.__doc__) greet("Alice") 输出结果: greet Prints a greeting. Wrapper is doing something before calling the function. Hello, Alice! Wrapper is doing something after calling the function. 这样,即使经过装饰,greet函数的名称和文档字符串也得以保留,提高了代码的可读...
def__get__(self,instance,owner):returnself._score def__delete__(self):del self._scoreclassStudent:math=Score(0)chinese=Score(0)english=Score(0)def__init__(self,name,math,chinese,english):self.name=name self.math=math self.chinese=chinese ...
class Vehicle: def name(self, name): return name v = Vehicle() print(type(v).__name__) Run Code Output Vehicle Using attribute __name__ with type(), you can get the class name of an instance/object as shown in the example above. type() gives the class of object v and __nam...
instance to which this method is bound, or None function __doc__ documentation string __name__ name with which this function was defined func_code code object containing compiled function bytecode func_defaults tuple of any default values for arguments func_doc (same as __doc__) func_global...
def get_name(self):"返回类的实例的名称"return self.name instance_of_a = A('一个实例')class B(A):"""这是类B 它继承自A类."""# 这个方法是B类独有的方法.def do_something(self):"""B类的实例提供的接口"""pass def get_name(self):"重写了A类的方法"return 'B(' + self.name + ')...
# 进一步访问变量i将引发NameError异常, # 由于该变量已不存在 del i i += 5 # 现在抛出异常: NameError: name 'i' is not defined 所有现有变量仅引用一个值。在Python中,没有未分配或未初始化的变量。为了表示没有值,Python提供了一个特殊的对象:None。在C或ST中,您将使用空指针。它的唯一目的是表达...
classRange:def__init__(self,min_value,max_value):self.min_value=min_valueself.max_value=max_valuedef__get__(self,instance,owner):returninstance.__dict__.get(self.name)def__set__(self,instance,value):ifnot(self.min_value<=value<=self.max_value):raiseValueError(f"Value must be ...
name,data):self.name=name# 实例属性self.data=[]# 实例属性# 实例方法defappend(self,value):self.data.append(value)# 实例方法defget_name(self):returnself.name# 类对象属性引用print(MyClass.i)# 12345# 类对象属性被赋值MyClass.i=10print(MyClass.i)# 10# 实例方法的引用print(MyClass.append...