我正在尝试按照说明安装AWS-IoT-Arduino-Yún-SDK并收到此错误：
pip install paho-mqtt
Traceback (most recent call last):
File "/usr/bin/pip", line 9, in <module>
load_entry_point('pip==7.1.2', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 337, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2281, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 1991, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/__init__.py", line 15, in <module>
from pip.vcs import git, mercurial, subversion, bazaar # noqa
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/vcs/subversion.py", line 9, in <module>
from pip.index import Link
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 30, in <module>
from pip.wheel import Wheel, wheel_ext
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/wheel.py", line 35, in <module>
from pip._vendor.distlib.scripts import ScriptMaker
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/distlib/scripts.py", line 14, in <module>
from .compat import sysconfig, detect_encoding, ZipFile
File "/usr/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/distlib/compat.py", line 31, in <module>
from urllib2 import (Request, urlopen, URLError, HTTPError,
ImportError: cannot import name HTTPSHandler
任何想法可以在这里做什么？