Python“pip install”이 AttributeError로 인해 실패합니다 : 'module'개체에 'SSL_ST_INIT'속성이 없습니다. $ sudo pip install --upgrade pyOpenSSL Traceback (most recent call last): File "/usr/local/bin/pip", line 9, in load_entry_point('pip==8.1.1', 'console_scripts', 'pip')() File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 558, in load_entry_point return get_distribution(dist).load_entry_point(..