我尝试安装ttn软件包，但不能！例外是：
Exception:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1198, in prepare_files
do_download,
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1376, in unpack_url
self.session,
File "/usr/lib/python2.7/dist-packages/pip/download.py", line 572, in unpack_http_url
download_hash = _download_url(resp, link, temp_location)
File "/usr/lib/python2.7/dist-packages/pip/download.py", line 433, in _download_url
for chunk in resp_read(4096):
File "/usr/lib/python2.7/dist-packages/pip/download.py", line 421, in resp_read
chunk_size, decode_content=False):
File "/usr/share/python-wheels/urllib3-1.7.1-py2.py3-none-any.whl/urllib3/response.py", line 225, in stream
data = self.read(amt=amt, decode_content=decode_content)
File "/usr/share/python-wheels/urllib3-1.7.1-py2.py3-none-any.whl/urllib3/response.py", line 174, in read
data = self._fp.read(amt)
File "/usr/lib/python2.7/httplib.py", line 602, in read
s = self.fp.read(amt)
File "/usr/lib/python2.7/socket.py", line 380, in read
data = self._sock.recv(left)
File "/usr/lib/python2.7/ssl.py", line 341, in recv
return self.read(buflen)
File "/usr/lib/python2.7/ssl.py", line 260, in read
return self._sslobj.read(len)
SSLError: The read operation timed out
Storing debug log for failure in /root/.pip/pip.log
我遵循了这个规则，例如：https://www.thethingsnetwork.org/docs/applications/python//#installation
我的操作系统：
$: lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 14.04.5 LTS
Release: 14.04
Codename: trusty
$: uname -a
Linux ubuntu64-phytec-User 4.4.0-96-generic #119~14.04.1-Ubuntu SMP Wed Sep 13 08:40:48 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
有什么建议吗？也许因为不赢而无法使用？