我正在开发一个名为“lehmer”的 Python 包,其中包括一堆用 C 编写的扩展模块。目前,我有一个扩展模块“rng”。我正在使用 Python 的 Distutils 来构建和安装模块。我可以编译和安装模块,但是当我尝试使用import lehmer.rng
or导入模块时from lehmer import rng
,Python 解释器会抛出ImportError
异常。我可以很好地导入“lehmer”。
这是我的setup.py
文件的内容:
from distutils.core import setup, Extension
exts = [Extension("rng", ["lehmer/rng.c"])]
setup(name="lehmer",
version="0.1",
description="A Lehmer random number generator",
author="Steve Park, Dave Geyer, and Michael Dippery",
maintainer="Michael Dippery",
maintainer_email="mpd@cs.wm.edu",
packages=["lehmer"],
ext_package="lehmer",
ext_modules=exts)
当我列出 Pythonsite-packages
目录的内容时,我看到以下内容:
th107c-4 lehmer $ ls /scratch/usr/lib64/python2.5/site-packages/lehmer
__init__.py __init__.pyc rng.so*
我的PYTHONPATH
环境变量设置正确,所以这不是问题(如前所述,我可以import lehmer
很好,所以我知道这PYTHONPATH
不是问题)。Python 使用以下搜索路径(由 报告sys.path
):
['', '/scratch/usr/lib64/python2.5/site-packages', '/usr/lib/python25.zip', '/usr/lib64/python2.5', '/usr/lib64/python2.5/plat-linux2', '/usr/lib64/python2.5/lib-tk', '/usr/lib64/python2.5/lib-dynload', '/usr/lib64/python2.5/site-packages', '/usr/lib64/python2.5/site-packages/Numeric', '/usr/lib64/python2.5/site-packages/PIL', '/usr/lib64/python2.5/site-packages/SaX', '/usr/lib64/python2.5/site-packages/gtk-2.0', '/usr/lib64/python2.5/site-packages/wx-2.8-gtk2-unicode', '/usr/local/lib64/python2.5/site-packages']
更新
在 OpenSUSE 10 机器上使用时它可以工作,但在 Mac OS X 上测试时仍然无法加载 C 扩展。以下是 Python 解释器的结果:
>>> sys.path
['', '/usr/local/lib/python2.5/site-packages', '/opt/local/lib/python25.zip', '/opt/local/lib/python2.5', '/opt/local/lib/python2.5/plat-darwin', '/opt/local/lib/python2.5/plat-mac', '/opt/local/lib/python2.5/plat-mac/lib-scriptpackages', '/opt/local/lib/python2.5/lib-tk', '/opt/local/lib/python2.5/lib-dynload', '/opt/local/lib/python2.5/site-packages']
>>> from lehmer import rng
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name rng
>>> import lehmer.rngs
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named rngs
>>> import lehmer.rng
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named rng
>>> from lehmer import rngs
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name rngs