无法安装pylint。AttributeError: 'NoneType' object has no attribute 'startswith'

来源：6-5 熟悉VSCode开发环境与Python插件安装

qq_森林中的小熊_0

2017-12-29

File "f:\python3\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 589, in urlopen
    self._prepare_proxy(conn)
File "f:\python3\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 797, in _prepare_proxy
    conn.connect()
File "f:\python3\lib\site-packages\pip\_vendor\requests\packages\urllib3\connection.py", line 254, in connect
    conn = self._new_conn()
File "f:\python3\lib\site-packages\pip\_vendor\requests\packages\urllib3\connection.py", line 142, in _new_conn
    (self.host, self.port), self.timeout, **extra_kw)
File "f:\python3\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\connection.py", line 66, in create_connection
    if host.startswith('['):
AttributeError: 'NoneType' object has no attribute 'startswith'

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