自我做什么？

发布于 2024-11-20 00:01:36 字数 352 浏览 4 评论 0原文

可能的重复：
Python“self”关键字

请原谅我，如果这是一个令人难以置信的菜鸟问题，但我从来没有理解 self Python。它有什么作用？当我看到

def example(self, args):
    return self.something

他们在做什么时？我想我也在函数中的某个地方看到了 args 。请简单解释一下:P

原文

Possible Duplicate:
Python 'self' keyword

Forgive me if this is an incredibly noobish question, but I never did understand self in Python. What does it do? And when I see things like

def example(self, args):
    return self.something

what do they do? I think I've seen args somewhere in a function too. Please explain in a simple way :P

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老子叫无熙 2024-11-27 00:01:36

听起来您好像偶然发现了 Python 的面向对象功能。

self 是对对象的引用。它与许多 C 风格语言中的 this 概念非常接近。查看这段代码：

class Car(object):

  def __init__(self, make):

      # Set the user-defined 'make' property on the self object 
      self.make = make

      # Set the 'horn' property on the 'self' object to 'BEEEEEP'
      self.horn = 'BEEEEEP'

  def honk(self):

      # Now we can make some noise!
      print self.horn

# Create a new object of type Car, and attach it to the name `lambo`. 
# `lambo` in the code below refers to the exact same object as 'self' in the code above.

lambo = Car('Lamborghini')
print lambo.make
lambo.honk()

It sounds like you've stumbled onto the object oriented features of Python.

self is a reference to an object. It's very close to the concept of this in many C-style languages. Check out this code:

class Car(object):

  def __init__(self, make):

      # Set the user-defined 'make' property on the self object 
      self.make = make

      # Set the 'horn' property on the 'self' object to 'BEEEEEP'
      self.horn = 'BEEEEEP'

  def honk(self):

      # Now we can make some noise!
      print self.horn

# Create a new object of type Car, and attach it to the name `lambo`. 
# `lambo` in the code below refers to the exact same object as 'self' in the code above.

lambo = Car('Lamborghini')
print lambo.make
lambo.honk()

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