types

>>> from hello import Hello
>>> h = Hello()
>>> h.hello()
Hello, world.
>>> print(type(Hello))
<type ‘type‘>
>>> print(type(h))
<class ‘hello.Hello‘>

要创建一个class对象,type()函数依次传入3个参数:

  1. class的名称;
  2. 继承的父类集合,注意Python支持多重继承,如果只有一个父类,别忘了tuple的单元素写法;
  3. class的方法名称与函数绑定,这里我们把函数fn绑定到方法名hello上。
时间: 2024-10-01 20:38:50

types的相关文章

[C++] Variables and Basic Types

Getting Started compile C++ program source $ g++ -o prog grog1.cc run C++ program $ ./prog The library, iostream, define four IO object: cin, cout, cerr, clog. std::cout << "hello world" << std::endl; The result of the output operato

Android开发:《Gradle Recipes for Android》阅读笔记(翻译)3.1——使用Build Types

问题: 你想要自定义debug和release的build types,并且新建一些新的types. 解决方案: 使用buildTypes块配置build types. 讨论: build type决定了app如何被打包.默认的,android的gradle插件支持两种build type:debug和release.两种都在模块的build.gradle文件中的buildTypes块下定义.在新的项目下的buildTypes块如下: 例子中值显示了release的build,但是想要编辑默认配

QML学习【一】Basic Types

  QML入门教程(1) QML是什么? QML是一种描述性的脚本语言,文件格式以.qml结尾.语法格式非常像CSS(参考后文具体例子),但又支持javacript形式的编程控制.它结合了QtDesigner UI和QtScript的优点.QtDesigner可以设计出.ui界面文件,但是不支持和Qt原生C++代码的交互.QtScript可以和Qt原生代码进行交互,但是有一个缺点,如果要在脚本中创建一个继承于QObject的图形对象非常不方便,只能在Qt代码中创建图形对象,然后从 QtScrip

C语言 结构体指针赋值 incompatible types when assigning to type &#39;char[20]&#39; from type &#39;char *&#39;

strcpy(pstudent->name, "guo zhao wei "); 为什么错误,该怎么写,(红色行) 追问 为什么不能直接赋值啊, 追答 用char nnnn[20]定义的,用strcpy 用char *ppp定义的,用=来赋值 C语言 结构体指针赋值 incompatible types when assigning to type 'char[20]' from type 'char *'

mybatis报错invalid types () or values ()解决方法

### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class com.chry.browserServer.db.model.User with invalid types () or values (). ause: java.lang.NoSuchMethodException: com.chry.browserServer.db.model.User.<init>()] wit

高性能MySQL笔记-第4章Optimizing Schema and Data Types

1.Good schema design is pretty universal, but of course MySQL has special implementation details to consider. In a nutshell, it’s a good idea to keep things as small and simple as you can. MySQL likes simplicity, and so will the people who have to wo

but the supplied types were (flex.messaging.io.amf.ASObject) and converted to (null).&quot;

1.错误描述 [RPC Fault faultString="Cannot invoke method 'saveOrUpdate'. " faultCode="Server.ResourceUnavailable" faultDetail="The expected argument types are (com.***.***.model.****) but the supplied types were (flex.messaging.io.amf.

Unity的 A namespace can only contain types and namespace declarations问题

Assets/Scripts/KinectAction.cs(70,22): error CS0116: A namespace can only contain types and namespace declarationsAssets/Scripts/KinectAction.cs(78,10): error CS8025: Parsing error 中文问题,把这个文件改为ANSI编码,或者中文删掉错误就消失了

User-defined types

We have used many of Python’s built-in types; now we are going to define a new type. As an example, we will create a type called Point that represents a point in two-dimensional space. In mathematical notation, points are often written in parentheses

Introducing the Filter Types

The ActionFilterAttribute class implements both the IActionFilter and IResultFilter interfaces. This class is abstract, which forces you to provide an implementation. The AuthorizeAttribute and HandleErrorAttribute classes contain useful features and