Staticmethod主要用途是限定Namespace; 也就是说这个函数虽然是个普通的function,但是它只有这个class会用到,不适合作为module level的function,这时候就把它作为staticmethod。 如果不考虑namespace的问题的话直接在module里面def function就行了。
# point.py class Point: def __init__(self, x, y): self.x = x self.y = y @property def x(self): return self._x @x.setter def x(self, value): try: self._x = float(value) print("Validated!") except ValueError: raise ValueError('"x" must be a number') from None @prope...
property是一种特殊的属性,访问它时会执行一段功能(函数)然后返回值 2 为什么要用property 将一个类的函数定义成特性以后,对象再去使用的时候obj.name,根本无法察觉自己的name是执行了一个函数然后计算出来的,这种特性的使用方式遵循了统一访问的原则 上代码: class People: def __init__(self,name,age,sex,heig...
classMovie(object):def__init__(self, title, rating, runtime, budget, gross): self._budget =Noneself.title = title self.rating = rating self.runtime = runtime self.gross = gross self.budget = budget@propertydefbudget(self):returnself._budget@budget.setterdefbudget(self, value):ifvalue ...
比如这个h3节点有一个class属性值为“property-content-title-name”,这个属性可能不能唯一定位一个节点,但如果我们通过定位他的父节点,然后通过父节点寻找其下所有"class='property-content-title-name'"的子节点,则能够帮我们准确的定位。 好了,用如上同样的方法,我们可以逐步对我们要获取的数据对应的网页元素进行...
35. issubclass(class, classinfo):如果class是classinfo的派生类,则返回True;否则返回False。36. iter(obj[, sentinel]):返回一个迭代器对象。37. len(obj):返回对象obj的长度(元素个数)。38. list(iterable):将可迭代对象iterable转换为列表。39. locals():返回当前局部符号表的字典。40. map(...
>>> class User(object): ... def get_name(self): return self.__name ... def set_name(self, value): self.__name = value ... def del_name(self): del self.__name ... name = property(get_name, set_name, del_name, "help...") >>> for k, v in User.__dict__.items(...
1.1 实例属性实例属性属于类的实例,每个实例都有自己的副本。可以在类的__init__方法中进行初始化。classPerson:def__init__(self, name, age): self.name = name # 实例属性name self.age = age # 实例属性age# 创建Person实例person1 = Person("Alice", 30)person2 = Person("Bob", 25...
class Player1(object): def __init__(self, uid, name, status=0, level=1): self.uid = uid self.name = name self.status = status self.level = level class Player2(object): __slots__ = ['uid', 'name', 'status', 'kevek'] def __init__(self, uid, name, status=0, level=1...
I have a class with two class methods (using the classmethod() function) for getting and setting what is essentially a static variable. I tried to use the property() function with these, but it results in an error. I was able to reproduce the error with the following in the interpreter...