我一直在尝试在我的Ansible控制服务器上安装pywinrm模块，该服务器在RHEL 6上使用Python 2.6（预安装）运行。
但依赖加密模块失败并出现错误：
Installing collected packages: cryptography
Running setup.py install for cryptography ... error
Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-QE26MW/cryptography/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-BhDfJs-record/install-record.txt --single-version-externally-managed --compile:
Couldn't find index page for 'cffi' (maybe misspelled?)
No local packages or download links found for cffi>=1.7
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-QE26MW/cryptography/setup.py", line 307, in <module>
**keywords_with_side_effects(sys.argv)
File "/usr/lib64/python2.6/distutils/core.py", line 113, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/lib/python2.6/site-packages/setuptools/dist.py", line 221, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File "/usr/lib/python2.6/site-packages/setuptools/dist.py", line 245, in fetch_build_eggs
parse_requirements(requires), installer=self.fetch_build_egg
File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 538, in resolve
dist = best[req.key] = env.best_match(req, self, installer)
File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 780, in best_match
return self.obtain(req, installer) # try and download/install
File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 792, in obtain
return installer(requirement)
File "/usr/lib/python2.6/site-packages/setuptools/dist.py", line 293, in fetch_build_egg
return cmd.easy_install(req)
File "/usr/lib/python2.6/site-packages/setuptools/command/easy_install.py", line 466, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('cffi>=1.7')
----------------------------------------
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-QE26MW/cryptography/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-BhDfJs-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-QE26MW/cryptography/
有人建议更新cffi模块，但这没有任何帮助，因为它表明它已经是最新的：
[root@BLRCSLLIQQA0005 cryptography]# pip install -U cffi
DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
SNIMissingWarning
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Requirement already up-to-date: cffi in /usr/lib64/python2.6/site-packages
Requirement already up-to-date: pycparser in /usr/lib/python2.6/site-packages (from cffi)
在cryptography的安装文档中，我将libffi-devel视为依赖项。但是当我尝试安装时，我得到了：
cryptography]# sudo yum install redhat-rpm-config gcc libffi-devel
Loaded plugins: product-id, refresh-packagekit, subscription-manager
This system is receiving updates from Red Hat Subscription Management.
rhel-6-server-rpms | 3.5 kB 00:00
rhel-server-dts-6-rpms | 3.4 kB 00:00
rhel-server-dts2-6-rpms | 3.2 kB 00:00
Setting up Install Process
Package redhat-rpm-config-9.0.3-51.el6.noarch already installed and latest version
Package gcc-4.4.7-18.el6.x86_64 already installed and latest version
No package libffi-devel available.
Nothing to do
这是我的pip堆栈，
cryptography]# pip freeze
DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6
ansible==2.3.1.0
asn1crypto==0.23.0
Babel==0.9.4
Beaker==1.3.1
cas==0.15
certifi==2017.7.27.1
cffi==1.11.2
chardet==3.0.4
cups==1.0
cupshelpers==1.0
decorator==3.0.1
enum34==1.1.6
ethtool==0.6
firstboot==1.110
freeipa==2.0.0a0
httplib2==0.7.7
idna==2.6
iniparse==0.3.1
iotop==0.3.2
ipaddress==1.0.18
ipapython==2.1.3
iwlib==1.0
kerberos==1.1
lxml==2.2.3
M2Crypto==0.20.2
Magic-file-extensions==0.1
Mako==0.3.4
MarkupSafe==0.9.2
matplotlib==0.99.1.1
ndg-httpsclient==0.4.3
netaddr==0.7.5
nose==0.10.4
numpy==1.3.0
ordereddict==1.2
paramiko==1.7.5
passlib==1.7.1
pyasn1==0.0.12a0
pycparser==2.18
pycrypto==2.0.1
pycurl==7.19.0
pygpgme==0.1
pykerberos==1.1.14
pyOpenSSL==0.10
python-dateutil==1.4.1
python-default-encoding==0.1
python-dmidecode==3.10.13
python-keyczar==0.71rc0
python-ldap==2.3.10
python-meh==0.11
python-nss==0.11
pytz===2010h
pyxdg==0.18
PyXML==0.8.4
PyYAML==3.10
requests==2.18.4
requests-kerberos==0.11.0
rhnlib==2.5.22
rhsm==1.1.8
scdate==1.9.60
scservices==0.99.45
scservices.dbus==0.99.45
simplejson==2.0.9
six==1.9.0
slip==0.2.11
slip.dbus==0.2.11
slip.gtk==0.2.11
smbc==1.0
SSSDConfig==1
urlgrabber==3.9.1
urllib3==1.22
virtinst==0.600.0
xmltodict==0.11.0
yum-metadata-parser==1.1.2
如果您需要任何进一步的信息，请与我们联系。这是一个主要障碍。我无法找到任何有相同问题的博客或帖子。
答案 0 :(得分：0)
Python2.6已折旧且不再维护。尝试将其升级到最新版本