我在Windows上使用python 2.7。当我试图使用[setuptools][2]的easy_install安装[lxml][1]时，为什么会发生以下错误？C:\>easy_install lxml

Searching for lxml

Reading http://pypi.python.org/simple/lxml/

Reading http://codespeak.net/lxml

Best match: lxml 2.3.3

Downloading http://lxml.de/files/lxml-2.3.3.tgz

Processing lxml-2.3.3.tgz

Running lxml-2.3.3\setup.py -q bdist_egg --dist-dir c:\users\my_user\appdata\local\temp\easy_install-mtrdj2\lxml-2.3.3\egg-dist-tmp-tq8rx4

Building lxml version 2.3.3.

Building without Cython.

ERROR: 'xslt-config' is not recognized as an internal or external command,

operable program or batch file.

** make sure the development packages of libxml2 and libxslt are installed **

Using build configuration of libxslt

warning: no files found matching 'lxml.etree.c' under directory 'src\lxml'

warning: no files found matching 'lxml.objectify.c' under directory 'src\lxml'

warning: no files found matching 'lxml.etree.h' under directory 'src\lxml'

warning: no files found matching 'lxml.etree_api.h' under directory 'src\lxml'

warning: no files found matching 'etree_defs.h' under directory 'src\lxml'

warning: no files found matching 'pubkey.asc' under directory 'doc'

warning: no files found matching 'tagpython*.png' under directory 'doc'

warning: no files found matching 'Makefile' under directory 'doc'

error: Setup script exited with error: Unable to find vcvarsall.bat

下载包并运行setup.py install也没有帮助：D:\My Documents\Installs\Dev\Python\lxml\lxml-2.3.3>setup.py install

Building lxml version 2.3.3.

Building without Cython.

ERROR: 'xslt-config' is not recognized as an internal or external command,

operable program or batch file.

** make sure the development packages of libxml2 and libxslt are installed **

Using build configuration of libxslt

running install

running bdist_egg

running egg_info

writing src\lxml.egg-info\PKG-INFO

writing top-level names to src\lxml.egg-info\top_level.txt

writing dependency_links to src\lxml.egg-info\dependency_links.txt

reading manifest file 'src\lxml.egg-info\SOURCES.txt'

reading manifest template 'MANIFEST.in'

warning: no files found matching 'lxml.etree.c' under directory 'src\lxml'

warning: no files found matching 'lxml.objectify.c' under directory 'src\lxml'

warning: no files found matching 'lxml.etree.h' under directory 'src\lxml'

warning: no files found matching 'lxml.etree_api.h' under directory 'src\lxml'

warning: no files found matching 'etree_defs.h' under directory 'src\lxml'

warning: no files found matching 'pubkey.asc' under directory 'doc'

warning: no files found matching 'tagpython*.png' under directory 'doc'

warning: no files found matching 'Makefile' under directory 'doc'

writing manifest file 'src\lxml.egg-info\SOURCES.txt'

installing library code to build\bdist.win32\egg

running install_lib

running build_py

creating build

creating build\lib.win32-2.7

creating build\lib.win32-2.7\lxml

copying src\lxml\builder.py -> build\lib.win32-2.7\lxml

copying src\lxml\cssselect.py -> build\lib.win32-2.7\lxml

copying src\lxml\doctestcompare.py -> build\lib.win32-2.7\lxml

copying src\lxml\ElementInclude.py -> build\lib.win32-2.7\lxml

copying src\lxml\pyclasslookup.py -> build\lib.win32-2.7\lxml

copying src\lxml\sax.py -> build\lib.win32-2.7\lxml

copying src\lxml\usedoctest.py -> build\lib.win32-2.7\lxml

copying src\lxml\_elementpath.py -> build\lib.win32-2.7\lxml

copying src\lxml\__init__.py -> build\lib.win32-2.7\lxml

creating build\lib.win32-2.7\lxml\html

copying src\lxml\html\builder.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\clean.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\defs.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\diff.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\ElementSoup.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\formfill.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\html5parser.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\soupparser.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\usedoctest.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\_dictmixin.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\_diffcommand.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\_html5builder.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\_setmixin.py -> build\lib.win32-2.7\lxml\html

copying src\lxml\html\__init__.py -> build\lib.win32-2.7\lxml\html

creating build\lib.win32-2.7\lxml\isoschematron

copying src\lxml\isoschematron\__init__.py -> build\lib.win32-2.7\lxml\isoschematron

copying src\lxml\etreepublic.pxd -> build\lib.win32-2.7\lxml

copying src\lxml\tree.pxd -> build\lib.win32-2.7\lxml

copying src\lxml\etree_defs.h -> build\lib.win32-2.7\lxml

creating build\lib.win32-2.7\lxml\isoschematron\resources

creating build\lib.win32-2.7\lxml\isoschematron\resources\rng

copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win32-2.7\lxml\isoschematron\resources\rng

creating build\lib.win32-2.7\lxml\isoschematron\resources\xsl

copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl

copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl

creating build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win32-2.7\lxml\isoschematron\resources\xsl\iso-schematron-xslt1

running build_ext

building 'lxml.etree' extension

error: Unable to find vcvarsall.bat

[1]: http://lxml.de/

[2]: http://pypi.python.org/pypi/setuptools