問題：
?pip2 install mbed-cli
Traceback (most recent call last): File "/usr/local/bin/pip2", line 7, in <module> from pip._internal import main File "/usr/local/lib/python2.7/dist-packages/pip/_internal/__init__.py", line 40, in <module> from pip._internal.cli.autocompletion import autocomplete File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/autocompletion.py", line 8, in <module> from pip._internal.cli.main_parser import create_main_parser File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/main_parser.py", line 12, in <module> from pip._internal.commands import ( File "/usr/local/lib/python2.7/dist-packages/pip/_internal/commands/__init__.py", line 6, in <module> from pip._internal.commands.completion import CompletionCommand File "/usr/local/lib/python2.7/dist-packages/pip/_internal/commands/completion.py", line 6, in <module> from pip._internal.cli.base_command import Command File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/base_command.py", line 18, in <module> from pip._internal.download import PipSession File "/usr/local/lib/python2.7/dist-packages/pip/_internal/download.py", line 15, in <module> from pip._vendor import requests, six, urllib3 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/__init__.py", line 97, in <module> from pip._vendor.urllib3.contrib import pyopenssl File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/urllib3/contrib/pyopenssl.py", line 46, in <module> import OpenSSL.SSL File "/usr/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 8, in <module> from OpenSSL import rand, crypto, SSL File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 118, in <module> SSL_ST_INIT = _lib.SSL_ST_INIT AttributeError: 'module' object has no attribute 'SSL_ST_INIT'
解決方案：
rm -rf /usr/lib/python2.7/dist-packages/OpenSSL
rm-rf /usr/lib/python2.7/dist-packages/pyOpenSSL-0.15.1.egg-infosudo
pip install pyopenssl
