Python / Django正在导入错误的模块（相对应该是绝对的） [英] Python/Django is importing the wrong module (relative when it should be absolute)

问题描述

我使用的是Django 1.2 pre-alpha和Python 2.4。是的，我知道，但我坚持下去。我们目前无法升级，我怀疑这是答案。

我有两个模板标签库， foo 和 bar 。但是， foo 也是顶级包的名称，它恰好是 bar 的包：

  foo-1.2.3 / 
 foo / 
 conf / 
 settings.py 
 templatetags / 
 bar.py 
 
 bar-4.5 / 
 somepackage / 
 templatetags / 
 foo.py 
  

标签库 bar.py 包含一行如下：

 从foo.conf导入设置
  

...你会期望它加载 foo-1.2.3 / foo / conf / settings.py 。

但不是：

TemplateSyntaxError：'bar'不是有效的标签库：无法加载模板库从django.templatetags.bar，没有模块命名为conf

不幸的是，Django执行一点魔法，并绑定所有模板标签lib更新到 django.templatetags。* 。因此， bar 正在导入为 django.templatetags.bar ，当它从 foo.conf导入设置它最终导入 bar-4.5 / somepackage / templatetags / foo.py 。呃！

你有什么想法吗？

我在导入之前设置了一个断点，我已经确认 foo-1.2.3 在 sys.path ，但 import 关键字仍然发现错误的 foo 。

如果有帮助，请注意，我可以修改 foo-1.2.3 软件包（因为它已经在本地检查并正在逐步淘汰）但是我拒绝修改 bar-4.5 软件包（因为它是一个开放源码的软件包，并已被系统安装）。

解决方案

经过几个小时的黑客攻击，这是一个伎俩。

原始代码：

 从foo.conf导入设置
  

新代码

  foo = __import __（'foo'）
 conf = __import __（'foo .conf'）。conf 
 settings = __import __（'foo.conf.settings'）。conf .settings 
  

（我可能不需要第二行。）

Ewww。

I'm using Django 1.2 pre-alpha and Python 2.4. Yeah, I know, but I'm stuck with it. We can't upgrade at the moment and I doubt that's the answer anyway.

I've got two template tag libraries, foo and bar. However, foo is also the name of a top-level package, and it happens to be the package of bar:

foo-1.2.3/
  foo/
    conf/
      settings.py
    templatetags/
      bar.py

bar-4.5/
  somepackage/
    templatetags/
      foo.py

The tag library bar.py contains a line like this:

from foo.conf import settings

...and you would expect it to load foo-1.2.3/foo/conf/settings.py.

But no:

TemplateSyntaxError: 'bar' is not a valid tag library: Could not load template library from django.templatetags.bar, No module named conf

Unfortunately, Django performs a little magic and binds all template tag libraries to django.templatetags.*. Thus, bar is being imported as django.templatetags.bar, and when it calls from foo.conf import settings it ends up importing bar-4.5/somepackage/templatetags/foo.py. Ugh!

Do you have any ideas how to fix this?

I've set a breakpoint right before the import, and I've confirmed that foo-1.2.3 is at the beginning of sys.path, but the import keyword still finds the wrong foo.

If it helps, note that I can modify the foo-1.2.3 package (because it's been checked in locally and is being phased out), but I refuse to modify the bar-4.5 package (because it's an open-source package and has been installed system-wide).

解决方案

After a few more hours of hacking, this did the trick.

Original code:

from foo.conf import settings

New code:

foo = __import__('foo')
conf = __import__('foo.conf').conf
settings = __import__('foo.conf.settings').conf.settings

(I probably don't need the second line.)

Ewww.

这篇关于Python / Django正在导入错误的模块（相对应该是绝对的）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！