有人能为我提供一个导入整个模块目录的好方法吗? 我有一个这样的结构:

/Foo
    bar.py
    spam.py
    eggs.py

我尝试通过添加__init__.py并从Foo import *将其转换为一个包,但它没有按我希望的方式工作。


当前回答

我知道我正在更新一个相当旧的帖子,我尝试使用automodinit,但发现它的设置过程对python3是坏的。所以,基于Luca的回答,我想出了一个更简单的答案——可能不适合。zip——来解决这个问题,所以我想我应该在这里分享它:

在你的包的__init__.py模块中:

#!/usr/bin/env python
import os, pkgutil
__all__ = list(module for _, module, _ in pkgutil.iter_modules([os.path.dirname(__file__)]))

在你的包下面的另一个包里:

from yourpackage import *

然后,您将加载包中放置的所有模块,如果您编写了一个新模块,它也将被自动导入。当然,要小心使用这些东西,能力越大责任越大。

其他回答

只需通过importlib导入它们,并在包的__init__.py中递归地将它们添加到__all__(添加操作是可选的)。

/Foo
    bar.py
    spam.py
    eggs.py
    __init__.py

# __init__.py
import os
import importlib
pyfile_extes = ['py', ]
__all__ = [importlib.import_module('.%s' % filename, __package__) for filename in [os.path.splitext(i)[0] for i in os.listdir(os.path.dirname(__file__)) if os.path.splitext(i)[1] in pyfile_extes] if not filename.startswith('__')]
del os, importlib, pyfile_extes

注意你的__init__.py定义了__all__。模块-包文档说

The __init__.py files are required to make Python treat the directories as containing packages; this is done to prevent directories with a common name, such as string, from unintentionally hiding valid modules that occur later on the module search path. In the simplest case, __init__.py can just be an empty file, but it can also execute initialization code for the package or set the __all__ variable, described later. ... The only solution is for the package author to provide an explicit index of the package. The import statement uses the following convention: if a package’s __init__.py code defines a list named __all__, it is taken to be the list of module names that should be imported when from package import * is encountered. It is up to the package author to keep this list up-to-date when a new version of the package is released. Package authors may also decide not to support it, if they don’t see a use for importing * from their package. For example, the file sounds/effects/__init__.py could contain the following code: __all__ = ["echo", "surround", "reverse"] This would mean that from sound.effects import * would import the three named submodules of the sound package.

我自己也厌倦了这个问题,所以我写了一个名为automodinit的包来解决它。你可以从http://pypi.python.org/pypi/automodinit/上得到它。

用法是这样的:

将automodinit包包含到setup.py依赖项中。 像这样替换所有__init__.py文件:

__all__ = ["I will get rewritten"]
# Don't modify the line above, or this line!
import automodinit
automodinit.automodinit(__name__, __file__, globals())
del automodinit
# Anything else you want can go after here, it won't get modified.

就是这样!从现在开始导入一个模块将设置__all__为 模块中的.py[co]文件列表,也将导入每个文件 就好像你输入了:

for x in __all__: import x

因此,“from M import *”的效果与“import M”完全匹配。

automodinit从ZIP档案内部运行,因此是ZIP安全的。

尼尔

我也遇到过这个问题,这是我的解决方案:

import os

def loadImports(path):
    files = os.listdir(path)
    imps = []

    for i in range(len(files)):
        name = files[i].split('.')
        if len(name) > 1:
            if name[1] == 'py' and name[0] != '__init__':
               name = name[0]
               imps.append(name)

    file = open(path+'__init__.py','w')

    toWrite = '__all__ = '+str(imps)

    file.write(toWrite)
    file.close()

这个函数创建一个名为__init__.py的文件(在提供的文件夹中),其中包含一个__all__变量,该变量保存文件夹中的每个模块。

例如,我有一个名为Test的文件夹 它包含:

Foo.py
Bar.py

所以在脚本中,我想把模块导入,我会写:

loadImports('Test/')
from Test import *

这将从Test中导入所有内容,Test中的__init__.py文件现在将包含:

__all__ = ['Foo','Bar']

扩展Mihail的回答,我认为非黑客的方式(即不直接处理文件路径)如下:

在Foo/下创建一个空的__init__.py文件 执行

import pkgutil
import sys


def load_all_modules_from_dir(dirname):
    for importer, package_name, _ in pkgutil.iter_modules([dirname]):
        full_package_name = '%s.%s' % (dirname, package_name)
        if full_package_name not in sys.modules:
            module = importer.find_module(package_name
                        ).load_module(full_package_name)
            print module


load_all_modules_from_dir('Foo')

你会得到:

<module 'Foo.bar' from '/home/.../Foo/bar.pyc'>
<module 'Foo.spam' from '/home/.../Foo/spam.pyc'>