PyQt4 的 Python 导入失败

Question

我正在尝试使用“imp”库来导出 PyQt4 的所有符号。使用内置的“import PyQt4.QtCore”是可以的，但是python的代码失败了。 我的测试基于 Mac。 在Windows上，好像如果你在QtCore目录下放一个“init.py”（空文件也可以）， “导入 QtCore”会成功。 但在 Mac 上，由于某种未知原因，它失败了。 在 Cli 中：

bash-3.2# python
Python 2.7.5 (default, Mar  9 2014, 22:15:05)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import PyQt4.QtCore as f
>>> print f.__file__
/Library/Python/2.7/site-packages/PyQt4/QtCore.so

但是，这种用法失败了。

bash-3.2# cd /Library/Python/2.7/site-packages/PyQt4/
bash-3.2# python
Python 2.7.5 (default, Mar  9 2014, 22:15:05)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import QtCore
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SystemError: dynamic module not initialized properly

谁能解释一下？

Answer 1

QtCore 不能直接导入python。 QtCore 存在于 PyQt4 库中。要访问 QtCore 类，您需要执行以下操作：

Python 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> from PyQt4 import QtCore
>>> 

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.