Python:静态方法与类方法之间的区别 [英] Python : Difference between static methods vs class method

问题描述

可能重复:
Python中的@staticmethod和@classmethod有什么区别?

Possible Duplicate:
What is the difference between @staticmethod and @classmethod in Python?

• 我正在用python学习OOP，并了解了这两种方法
• 似乎语法上的差异在于，类方法是作为其第一个参数隐式传递其所属类的
• I am learning OOP in python and came to know about these two methods
• It seems that the difference in terms of syntax is that class methods are implicitly passed the class they belong to as their first parameter

class Circle:
  all_circles = [] # class variable

  @staticmethod
  def total_area():
      for c in Circle.all_circles: # hardcode class name
          # do somethig

  @classmethod
  def total_area(cls):
      for c in cls.all_circles: # no hardcode class name
          # do something

我认为类方法更灵活，因为我们不对类进行硬编码

I see class method as more flexible since we don't hardcode the class

问题:
-哪一个更好? @staticmethod或@classmethod?
-这些方法中的每一种都适合使用哪种方案?

Question:
- Is it even a question which one is better? @staticmethod or @classmethod?
- what are the scenarios suitable to use of each one of these methods?

推荐答案

classmethod传递了被调用的类'cls'.有关更多详细信息，请参见: @staticmethod和有什么区别和@classmethod在Python中?

A classmethod gets passed the class 'cls' that it was called upon. For more details see: What is the difference between @staticmethod and @classmethod in Python?

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