我自己到
https://pypi.python.org/pypi/lxml/3.4.4#downloads 这里下载 lxml-3.4.4.win-amd64-py3.4.exe (md5)，结果运行的时候说 python 3.4 没有发现，我晕了，我安装的是 3.5 ，难道不能向前兼容吗？
求助了，谢谢！
################
D:\Software\Programme\Python35\Scripts>pip install lxml
Collecting lxml
Using cached lxml-3.6.4.tar.gz
Installing collected packages: lxml
Running
setup.py install for lxml ... error
Complete output from command d:\software\programme\python35\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Qingwen\\AppData\\Local\\Temp\\pip-build-lsazecfw\\lxml\\
setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Qingwen\AppData\Local\Temp\pip-thoy_nfg-record\install-record.txt --single-version-externally-managed --compile:
Building lxml version 3.6.4.
Building without Cython.
ERROR: b"'xslt-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
** make sure the development packages of libxml2 and libxslt are installed **
Using build configuration of libxslt
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.5
creating build\lib.win-amd64-3.5\lxml
copying src\lxml\
builder.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
cssselect.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
doctestcompare.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
ElementInclude.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
pyclasslookup.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
sax.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
usedoctest.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
_elementpath.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
__init__.py -> build\lib.win-amd64-3.5\lxml
creating build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\
__init__.py -> build\lib.win-amd64-3.5\lxml\includes
creating build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
builder.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
clean.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
defs.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
diff.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
ElementSoup.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
formfill.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
html5parser.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
soupparser.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
usedoctest.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_diffcommand.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_html5builder.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_setmixin.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
__init__.py -> build\lib.win-amd64-3.5\lxml\html
creating build\lib.win-amd64-3.5\lxml\isoschematron
copying src\lxml\isoschematron\
__init__.py -> build\lib.win-amd64-3.5\lxml\isoschematron
copying src\lxml\lxml.etree.h -> build\lib.win-amd64-3.5\lxml
copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-3.5\lxml
copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\config.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-3.5\lxml\includes
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\rng
copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\rng
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
error: Unable to find vcvarsall.bat
----------------------------------------
Command "d:\software\programme\python35\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Qingwen\\AppData\\Local\\Temp\\pip-build-lsazecfw\\lxml\\
setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Qingwen\AppData\Local\Temp\pip-thoy_nfg-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\Qingwen\AppData\Local\Temp\pip-build-lsazecfw\lxml\
D:\Software\Programme\Python35\Scripts>easy_install --version
setuptools 20.10.1 from d:\software\programme\python35\lib\site-packages (Python 3.5)
D:\Software\Programme\Python35\Scripts>pip install lxml
Collecting lxml
Using cached lxml-3.6.4.tar.gz
Installing collected packages: lxml
Running
setup.py install for lxml ... error
Complete output from command d:\software\programme\python35\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Qingwen\\AppData\\Local\\Temp\\pip-build-v7ce26yr\\lxml\\
setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Qingwen\AppData\Local\Temp\pip-cddydwh4-record\install-record.txt --single-version-externally-managed --compile:
Building lxml version 3.6.4.
Building without Cython.
ERROR: b"'xslt-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
** make sure the development packages of libxml2 and libxslt are installed **
Using build configuration of libxslt
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.5
creating build\lib.win-amd64-3.5\lxml
copying src\lxml\
builder.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
cssselect.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
doctestcompare.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
ElementInclude.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
pyclasslookup.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
sax.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
usedoctest.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
_elementpath.py -> build\lib.win-amd64-3.5\lxml
copying src\lxml\
__init__.py -> build\lib.win-amd64-3.5\lxml
creating build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\
__init__.py -> build\lib.win-amd64-3.5\lxml\includes
creating build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
builder.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
clean.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
defs.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
diff.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
ElementSoup.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
formfill.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
html5parser.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
soupparser.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
usedoctest.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_diffcommand.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_html5builder.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
_setmixin.py -> build\lib.win-amd64-3.5\lxml\html
copying src\lxml\html\
__init__.py -> build\lib.win-amd64-3.5\lxml\html
creating build\lib.win-amd64-3.5\lxml\isoschematron
copying src\lxml\isoschematron\
__init__.py -> build\lib.win-amd64-3.5\lxml\isoschematron
copying src\lxml\lxml.etree.h -> build\lib.win-amd64-3.5\lxml
copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-3.5\lxml
copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\config.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-3.5\lxml\includes
copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-3.5\lxml\includes
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\rng
copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\rng
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl
creating build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-3.5\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
error: Unable to find vcvarsall.bat
----------------------------------------
Command "d:\software\programme\python35\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Qingwen\\AppData\\Local\\Temp\\pip-build-v7ce26yr\\lxml\\
setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Qingwen\AppData\Local\Temp\pip-cddydwh4-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\Qingwen\AppData\Local\Temp\pip-build-v7ce26yr\lxml\