__init__.py的作用是什么? [英] What is __init__.py for?
问题描述
Python源目录中的__init__.py
是什么?
What is __init__.py
for in a Python source directory?
推荐答案
It used to be a required part of a package (old, pre-3.3 "regular package", not newer 3.3+ "namespace package").
Python定义了两种类型的程序包,常规程序包和名称空间程序包.常规软件包是Python 3.2及更早版本中存在的传统软件包.常规软件包通常实现为包含
__init__.py
文件的目录.导入常规程序包时,该__init__.py
文件将隐式执行,并且其定义的对象将绑定到程序包名称空间中的名称.__init__.py
文件可以包含任何其他模块可以包含的相同Python代码,并且在导入时,Python将为该模块添加一些其他属性.
Python defines two types of packages, regular packages and namespace packages. Regular packages are traditional packages as they existed in Python 3.2 and earlier. A regular package is typically implemented as a directory containing an
__init__.py
file. When a regular package is imported, this__init__.py
file is implicitly executed, and the objects it defines are bound to names in the package’s namespace. The__init__.py
file can contain the same Python code that any other module can contain, and Python will add some additional attributes to the module when it is imported.
但是只需单击链接,它包含一个示例,更多信息以及对名称空间包的说明,即不带__init__.py
的包的类型.
But just click the link, it contains an example, more information, and an explanation of namespace packages, the kind of packages without __init__.py
.
这篇关于__init__.py的作用是什么?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!