从包中继承加载类(Loading classes with inheritance from package)

从包中继承加载类(Loading classes with inheritance from package)

以下结构：

app.py /package __init__.py foo.py bar.py

“foo.py”和“bar.py”包含“Foo”和“Bar”类。 “Foo”类继承自“Bar”类。 我们在文件中有以下代码......

“app.py”：

from package import Foo print Foo()

“的__init__.py”：

from foo import Foo from bar import Bar

“foo.py”：

class Foo(Bar): pass

“bar.py”：

class Bar: pass

如果我从“Foo”创建一个实例，我就成了一个名称错误“name'Bar'未定义”。 我需要做些什么来使它工作？ 我正在使用Python 2.6.6如果重要的话......

.oO（我是Python的新手）

Following structure:

app.py /package __init__.py foo.py bar.py

"foo.py" and "bar.py" contains both classes "Foo" and "Bar". Class "Foo" inherits from class "Bar". We have following code in the files...

"app.py":

from package import Foo print Foo()

"__init__.py":

from foo import Foo from bar import Bar

"foo.py":

class Foo(Bar): pass

"bar.py":

class Bar: pass

If I create an instance from "Foo" I became an name error "name 'Bar' is not defined". What I have to do to make it work? I am using Python 2.6.6 if it matters...

.oO(I'm new to Python)

最满意答案

你需要这条线

from bar import Bar

在文件foo.py （不仅仅是在__init.py__ ）。

You need the line

from bar import Bar

in the file foo.py (not just in __init.py__).