TA-Lib的Python包装:导入失败

Question

我遇到的佳作@ mrjbq7的工作谁写一个Python 包装为TA-库 -用C语言编写的开源技术分析库我已经安装了TA-Lib的(容易,因为平时configure,make,make install)作为以及根据说明使用包装器(使用包含的setup.py脚本)但在尝试导入模块或运行示例脚本时遇到导入错误(相同的导入错误).

我在Linux机器上(sys.platform == 'linux2')并使用Python 2.7的Enthought发行版.

我已经将TA-Lib安装到它的默认位置,这是由包装setuptools脚本指向的(你可以在这里看到setup.py的来源):

bash$ ls -la /usr/local/include/ta-lib/
total 240
drwxr-xr-x 2 root root   4096 2012-08-04 08:54 .
drwxr-xr-x 3 root root   4096 2012-08-04 08:54 ..
-rw-r--r-- 1 root root  19930 2012-08-04 08:54 ta_abstract.h
-rw-r--r-- 1 root root   4792 2012-08-04 08:54 ta_common.h
-rw-r--r-- 1 root root  12391 2012-08-04 08:54 ta_defs.h
-rw-r--r-- 1 root root 181115 2012-08-04 08:54 ta_func.h
-rw-r--r-- 1 root root   1849 2012-08-04 08:54 ta_libc.h

bash$ ls -la /usr/local/lib
total 4956
drwxr-xr-x  3 root root    4096 2012-08-04 08:54 .
drwxr-xr-x 12 root root    4096 2011-04-06 23:47 ..
-rw-r--r--  1 root root 3063180 2012-08-04 08:54 libta_lib.a
-rwxr-xr-x  1 root root     837 2012-08-04 08:54 libta_lib.la
lrwxrwxrwx  1 root root      18 2012-08-04 08:54 libta_lib.so -> libta_lib.so.0.0.0
lrwxrwxrwx  1 root root      18 2012-08-04 08:54 libta_lib.so.0 -> libta_lib.so.0.0.0
-rwxr-xr-x  1 root root 1983243 2012-08-04 08:54 libta_lib.so.0.0.0
drwxr-xr-x 11 root root    4096 2011-04-07 17:10 pythonEPD

然后我使用python setup.py install以下方法成功构建了Cython代码:

bash$ python setup.py install
running install
running build
running build_ext
building 'talib' extension
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -O2 -I/usr/local/lib/pythonEPD/include -fPIC -I/usr/local/lib/pythonEPD/lib/python2.7/site-packages/numpy/core/include -I/usr/local/include/ta-lib/ -I/usr/local/lib/pythonEPD/include/python2.7 -c talib.c -o build/temp.linux-i686-2.7/talib.o

...
[truncated - lots of warnings regarding pointer types]
---

gcc -pthread -shared -g -L/usr/local/lib/pythonEPD/lib build/temp.linux-i686-2.7/talib.o -L/usr/local/lib/ -L. -lta_lib -lpython2.7 -o build/lib.linux-i686-2.7/talib.so
running install_lib
copying build/lib.linux-i686-2.7/talib.so -> /usr/local/lib/pythonEPD/lib/python2.7/site-packages
running install_egg_info
Writing /usr/local/lib/pythonEPD/lib/python2.7/site-packages/TA_Lib-0.4.0-py2.7.egg-info

然而,当我尝试运行示例脚本或导入talib时,我得到以下导入错误:

bash$ python
Enthought Python Distribution -- www.enthought.com
Version: 7.0-2 (32-bit)

Python 2.7.1 |EPD 7.0-2 (32-bit)| (r271:86832, Nov 29 2010, 13:52:51) 
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import talib
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: libta_lib.so.0: cannot open shared object file: No such file or directory

setup.py脚本清楚地包含了Extension类中编译的TA-Lib代码的相应路径,但我注意到gccCython代码构建中的命令不包含对/usr/local/lib路径的引用...(不确定是否这样问题是什么？).

我希望有人遇到过这个模块或类似的情况吗？

Answer 1

关闭@rcovre,我在@ mrjbq的github网站上发布了一个问题,他回答了一个非常简单的解决方案:

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

对于永久的解决方案,必须添加/usr/local/lib到/etc/ld.so.conf作为根然后运行/sbin/ldconfig(也为根目录).

奇迹般有效.

https://github.com/mrjbq7/ta-lib/issues/6