配置安装python2.7如下：
./configure --enable-shared --with-ssl
make
install
然后使用命令安装 gunicorn python setup.py install。
安装顺利，没有任何问题，但现在当我运行时
gunicorn django.wsgi:application
我遇到了错误。我应该怎么做才能继续前进？
Error: class uri 'sync' invalid or not found:
[Traceback (most recent call last):
File "/glbdevuser6/glb/portal/aettool/local/lib/python2.7/site-packages/gunicorn-17.5-py2.7.egg/gunicorn/util.py", line 124, in load_class
section, uri)
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 378, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2566, in load_entry_point
return ep.load()
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2260, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/glbdevuser6/glb/portal/aettool/local/lib/python2.7/site-packages/gunicorn-17.5-py2.7.egg/gunicorn/workers/sync.py", line 12, in <module>
import ssl
File "/glbdevuser6/glb/portal/aettool/local/lib/python2.7/ssl.py", line 60, in <module>
import _ssl # if we can't import it, let the error propagate
ImportError: No module named _ssl
]