在mac上用python安装lxml

时间:2012-03-24 23:58:02

标签: python installation lxml importerror elementtree

首先,我在不使用pip的情况下安装了lxml(Mac OS 10.6.8上的Python 2.7.2)。然后,我阅读this post并使用pip(sudo pip install lxml)再次安装它。我还有一个问题:

我可以导入lxml(import lxml)但我不能使用from lxml import etree。我有此错误消息:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml-2.3.3-py2.7-macosx-10.6-intel.egg/lxml/etree.so, 2): Symbol not found: _htmlParseChunk
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml-2.3.3-py2.7-macosx-10.6-intel.egg/lxml/etree.so
  Expected in: flat namespace
 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml-2.3.3-py2.7-macosx-10.6-intel.egg/lxml/etree.so

然后,我尝试在these instructions之后从源安装lxml,我收到此错误消息:

checking whether we are cross compiling... configure: error: in `/Users/my_name/Applications/lxml/lxml-2.2.2/build/tmp/libxml2-2.7.8':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details
Traceback (most recent call last):
  File "setup.py", line 115, in <module>
    STATIC_CFLAGS, STATIC_BINARIES),
  File "/Users/my_name/Applications/lxml/lxml-2.2.2/setupinfo.py", line 50, in ext_modules
    libxslt_version=OPTION_LIBXSLT_VERSION)
  File "/Users/my_name/Applications/lxml/lxml-2.2.2/buildlibxml.py", line 198, in build_libxml2xslt
    call_subprocess(configure_cmd, cwd=libxml2_dir, **call_setup)
  File "/Users/my_name/Applications/lxml/lxml-2.2.2/buildlibxml.py", line 158, in call_subprocess
    raise Exception('Command "%s" returned code %s' % (cmd_desc, returncode))
Exception: Command "./configure --without-python --disable-dependency-tracking --disable-shared --prefix=/Users/my_name/Applications/lxml/lxml-2.2.2/build/tmp/libxml2" returned code 1

最后,我遵循了this answer的第二个建议,并使用了命令行sudo STATIC_DEPS=true /usr/bin/easy_install-2.7 lxml。它在Apple提供的系统Python 2.7上安装了lxml,而不是我当前使用的版本。积极的一点是:如果我运行Apple-Python,我可以from lxml import etree

否定点:我仍然不知道如何在另一个版本的python上安装lxml。有什么想法吗?

我目前正在使用/Library/Frameworks/Python.framework/Versions/2.7/bin/python

1 个答案:

答案 0 :(得分:4)

您需要为正在使用的Python版本安装单独的easy_install。有关详细信息,请参阅答案here。然后,您可以使用它运行easy_install命令:

STATIC_DEPS=true easy_install-2.7 lxml

更新:根据您的评论,您现在报告的是权限错误,显示另一条Python路径,一条似乎是MacPorts安装的Python:/opt/local/Library/Frameworks。您需要确定要使用的Python。实际上,如果您想使用MacPorts,只需安装MacPorts提供的lxml端口即可。这是最简单的解决方案。

$ sudo port selfupdate
$ sudo port install py27-lxml

否则,您需要安装easy_install与另一个(python.org?)Python 2.7.2。我建议使用Distribute,更现代的`setuptools'分支,你需要确保使用正确的Python:

$ curl -O http://python-distribute.org/distribute_setup.py
$ export PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"
$ which python2.7   # should be in the path above
$ python2.7 distribute_setup.py
$ STATIC_DEPS=true easy_install-2.7 lxml