误差追加到一个文件，并使用数组 [英] error with appending to a file and using an array

问题描述

我写了这个code：

    class component(object):

      def __init__(self,
                   name = None,
                   height = None,                 
                   width = None):

        self.name = name        
        self.height = height
        self.width = width

class system(object):

      def __init__(self,
                   name = None,                 
                   lines = None,
                   *component):

        self.name = name
        self.component = component

        if lines is None:
                self.lines = []
        else:
                            self.lines = lines

      def writeTOFile(self,
                      *component):
        self.component = component

        line =" "
        self.lines.append(line)

        line= "#----------------------------------------- SYSTEM ---------------------------------------#" 
        self.lines.append(line)


Component1 = component ( name = 'C1',
                         height = 500,
                         width = 400)
Component2 = component ( name = 'C2',
                         height = 600,
                         width = 700)

system1 = system(Component1, Component2)
system1.writeTOFile(Component1, Component2)

和我得到的错误：

  Traceback (most recent call last):
  File "C:\Python27\Work\trial2.py", line 46, in <module>
    system1.writeTOFile(Component1, Component2)
  File "C:\Python27\Work\trial2.py", line 32, in writeTOFile
    self.lines.append(line)
AttributeError: 'component' object has no attribute 'append'

和我真的不知道如何解决它。

And I don't really know how to fix it.

也有定义我的系统1的系统（组件）的方式，其中组件= [的Component1，COMPONENT2，... Componentn]

Also is there a way for defining my system1 as system(Component) where component = [Component1, Component2, ...Componentn] ?

谢谢adavance

Thanks in adavance

推荐答案

您已经在得到的东西乱序__ __初始化：

  def __init__(self, *component, **kwargs):

    self.name = kwargs.get('name')
    self.component = component

    self.lines = kwargs.get('lines', [])

将工作。您需要行和名称是 * 项目之后收集的组件。

Will work. You need lines and name to be after the * item that collects the component.

在Python 2里，你不能再命名属性的后 * ，所以你需要改用 ** kwargs 和获取（'名'）和的get（'行'）从 kwargs 。

In Python 2, you can't then have named attributes after a *, so you need to instead use **kwargs and get('name') and get('lines') from the kwargs.

GET 只返回无，如果你不提供一个默认的，所以您将获得 self.name =无在这里。如果要指定一个默认名称，你可以做

get just returns None if you don't supply a default, so you'll get self.name = None here. If you want to specify a default name, you can do

    self.name = kwargs.get('name', 'defaultname')

像我一样为行。

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