bash-3.2$ pip install lxml-2.3.5.tgz

Unpacking ./lxml-2.3.5.tgz

Running setup.py egg_info for package from file:///Users/apple/workspace/pythonhome/misc/lxml-2.3.5.tgz

Building lxml version 2.3.5.

Building with Cython 0.17.

Using build configuration of libxslt 1.1.27

Building against libxml2/libxslt in the following directory: /usr/local/lib

warning: no previously-included files found matching '*.py'

Installing collected packages: lxml

Running setup.py install for lxml

Building lxml version 2.3.5.

Building with Cython 0.17.

Using build configuration of libxslt 1.1.27

Building against libxml2/libxslt in the following directory: /usr/local/lib

skipping 'src/lxml/lxml.etree.c' Cython extension (up-to-date)

building 'lxml.etree' extension

llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/usr/local/include -I/usr/local/include/libxml2 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace

llvm-gcc-4.2 -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -L/usr/local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.6-intel-2.7/lxml/etree.so

skipping 'src/lxml/lxml.objectify.c' Cython extension (up-to-date)

building 'lxml.objectify' extension

llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/usr/local/include -I/usr/local/include/libxml2 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.objectify.o -w -flat_namespace

llvm-gcc-4.2 -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.objectify.o -L/usr/local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.6-intel-2.7/lxml/objectify.so

Successfully installed lxml

Cleaning up...

bash-3.2$ python

Python 2.7.3 (v2.7.3:70274d53c1dd, Apr 9 2012, 20:52:43)

[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import lxml

>>> import html

Traceback (most recent call last):

File "", line 1, in

ImportError: No module named html

>>> from lxml import html

Traceback (most recent call last):

File "", line 1, in

File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/html/__init__.py", line 12, in

from lxml import etree

ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so, 2): Symbol not found: _exsltDateXpathCtxtRegister

Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so

Expected in: flat namespace

in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so

get same error again for older version lxml2.3.4

bash-3.2$ pip install lxml-2.3.4.tgz

Unpacking ./lxml-2.3.4.tgz

Running setup.py egg_info for package from file:///Users/apple/workspace/pythonhome/misc/lxml-2.3.4.tgz

Building lxml version 2.3.4.

Building with Cython 0.17.

Using build configuration of libxslt 1.1.27

Building against libxml2/libxslt in the following directory: /usr/local/lib

warning: no previously-included files found matching '*.py'

Installing collected packages: lxml

Running setup.py install for lxml

Building lxml version 2.3.4.

Building with Cython 0.17.

Using build configuration of libxslt 1.1.27

Building against libxml2/libxslt in the following directory: /usr/local/lib

skipping 'src/lxml/lxml.etree.c' Cython extension (up-to-date)

building 'lxml.etree' extension

llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/usr/local/include -I/usr/local/include/libxml2 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace

llvm-gcc-4.2 -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -L/usr/local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.6-intel-2.7/lxml/etree.so

skipping 'src/lxml/lxml.objectify.c' Cython extension (up-to-date)

building 'lxml.objectify' extension

llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/usr/local/include -I/usr/local/include/libxml2 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.objectify.o -w -flat_namespace

llvm-gcc-4.2 -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.objectify.o -L/usr/local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.6-intel-2.7/lxml/objectify.so

Successfully installed lxml

Cleaning up...

bash-3.2$ python

Python 2.7.3 (v2.7.3:70274d53c1dd, Apr 9 2012, 20:52:43)

[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import os

>>> import lxml

>>> from lxml import etree

Traceback (most recent call last):

File "", line 1, in

ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so, 2): Symbol not found: _exsltDateXpathCtxtRegister

Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so

Expected in: flat namespace

in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so

解决方案

I think the key error here is this:

ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so, 2): Symbol not found: _exsltDateXpathCtxtRegister

Their suggestion:

You probably need to check your libxml/libxslt libraries. Make sure you have the versions required in the lxml installation instructions

Start by running

ldd /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/lxml/etree.so

That will show if you have any unresolved shared libraries. You may need to install/update some packages.

Check the thread linked above for more troubleshooting tips.