I am trying to install lxml on Mac and getting the following error. Can anyone help me with this error? Thanks.

Collecting lxml
Using cached lxml-3.8.0.tar.gz
Complete output from command python setup.py egg_info:
Building lxml version 3.8.0.
Latest version of zlib is 1.2.11
Downloading zlib into libs/zlib-1.2.11.tar.gz
Unpacking zlib-1.2.11.tar.gz into build/tmp
Latest version of libiconv is 1.15
Downloading libiconv into libs/libiconv-1.15.tar.gz
Unpacking libiconv-1.15.tar.gz into build/tmp
Latest version of libxml2 is 2.9.4
Downloading libxml2 into libs/libxml2-2.9.4.tar.gz
Unpacking libxml2-2.9.4.tar.gz into build/tmp
Traceback (most recent call last):
File "", line 1, in
File "/private/var/folders/5f/2cz5l0fd4rvgvtjq0wbqskc00000gp/T/pip-build-QAUTM1/lxml/setup.py", line 233, in
**setup_extra_options()
File "/private/var/folders/5f/2cz5l0fd4rvgvtjq0wbqskc00000gp/T/pip-build-QAUTM1/lxml/setup.py", line 144, in setup_extra_options
STATIC_CFLAGS, STATIC_BINARIES)
File "setupinfo.py", line 65, in ext_modules
multicore=OPTION_MULTICORE)
File "buildlibxml.py", line 359, in build_libxml2xslt
libxslt_dir = unpack_tarball(download_libxslt(download_dir, libxslt_version), build_dir)
File "buildlibxml.py", line 195, in download_libxslt
version_re, filename, version=version)
File "buildlibxml.py", line 218, in download_library
fns = ftp_listdir(location)
File "buildlibxml.py", line 137, in ftp_listdir
with closing(urlopen(url)) as res:
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 87, in urlopen
return opener.open(url)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 213, in open
return getattr(self, name)(url)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 558, in open_ftp
(fp, retrlen) = self.ftpcache[key].retrfile(file, type)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 926, in retrfile
conn, retrlen = self.ftp.ntransfercmd(cmd)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ftplib.py", line 334, in ntransfercmd
host, port = self.makepasv()
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ftplib.py", line 312, in makepasv
host, port = parse227(self.sendcmd('PASV'))
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ftplib.py", line 830, in parse227
raise error_reply, resp
IOError: [Errno ftp error] 200 Switching to ASCII mode.

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/5f/2cz5l0fd4rvgvtjq0wbqskc00000gp/T/pip-build-QAUTM1/lxml/