一些requirement错误的依赖
1：
running build_ext
building 'lxml.etree' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
creating build/temp.linux-x86_64-2.7/src/lxml
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/tmp/pip-build-ojS8_f/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
In file included from src/lxml/lxml.etree.c:239:0:
/tmp/pip-build-ojS8_f/lxml/src/lxml/includes/etree_defs.h:14:31: fatal error: libxml/xmlversion.h: No such file or directory
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Rolling back uninstall of lxml
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-ojS8_f/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-Us8AxU-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-ojS8_f/lxml/
解决办法：
123 sudo apt-get install libxml2 124 sudo apt-get install libxml2-dev 125 sudo apt-get install libxslt 126 sudo apt-get install libxslt-dev
2：
running build_ext
building 'lxml.etree' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
creating build/temp.linux-x86_64-2.7/src/lxml
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/libxml2 -I/tmp/pip-build-CQ2eUf/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wl,-Bsymbolic-functions -Wl,-z,relro -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-x86_64-2.7/lxml/etree.so
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Rolling back uninstall of lxml
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-CQ2eUf/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-6pI8W_-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-CQ2eUf/lxml/
解决办法：
sudo apt-get install libz-dev
3：
sh: 1: mysql_config: not found
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-Rg2RGC/MySQL-python/setup.py", line 17, in
metadata, options = get_config()
File "/tmp/pip-build-Rg2RGC/MySQL-python/setup_posix.py", line 43, in get_config
libs = mysql_config("libs_r")
File "/tmp/pip-build-Rg2RGC/MySQL-python/setup_posix.py", line 25, in mysql_config
raise EnvironmentError("%s not found" % (mysql_config.path,))
EnvironmentError: mysql_config not found
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-Rg2RGC/MySQL-python/
解决办法：
sudo apt-get install libmysqld-dev
4：
AttributeError: 'module' object has no attribute 'PROTOCOL_SSLv3'
这里更具体的
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python2.7/dist-packages/requests/__init__.py", line 53, in
from .packages.urllib3.contrib import pyopenssl
File "/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/contrib/pyopenssl.py", line 73, in
ssl.PROTOCOL_SSLv3: OpenSSL.SSL.SSLv3_METHOD,
AttributeError: 'module' object has no attribute 'PROTOCOL_SSLv3'
>>>
解决办法：
61 wget https://pypi.python.org/packages/ac/93/b4cd538d31adacd07f83013860db6b88d78755af1f3fefe68ec22d397e7b/pyOpenSSL-16.2.0-py2.py3-none-any.whl#md5=7c87cf718171f736f29d1becb4c7b7a5 62 sudo pip install pyOpenSSL-16.2.0-py2.py3-none-any.whl 63 sudo apt-get install libssl-dev 64 sudo apt-get install python-openssl
这里主要对比一下版本
