我在Flask Architecture中使用python。一切正常，直到机器崩溃。重新安装Ubuntu后，出现此有线错误。如果我缺少安装某些python软件包，谁能帮助我。
我很确定代码可以正常工作（不需要更改代码）
Traceback (most recent call last):
File "/home/omkars/Desktop/lib/python3.6/site-packages/urllib3/connection.py", line 159, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/home/omkars/Desktop/ea-tools-zon-service/lib/python3.6/site-packages/urllib3/util/connection.py", line 57, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/home/omkars/Desktop/ea-tools-zon-service/lib/python3.6/site-packages/gevent/_socketcommon.py", line 212, in getaddrinfo
addrlist = get_hub().resolver.getaddrinfo(host, port, family, type, proto, flags)
File "/home/omkars/Desktop/lib/python3.6/site-packages/gevent/resolver/thread.py", line 65, in getaddrinfo
return self.pool.apply(_socket.getaddrinfo, args, kwargs)
File "/home/omkars/Desktop/lib/python3.6/site-packages/gevent/pool.py", line 159, in apply
return self.spawn(func, *args, **kwds).get()
File "src/gevent/event.py", line 268, in gevent._event.AsyncResult.get
File "src/gevent/event.py", line 296, in gevent._event.AsyncResult.get
File "src/gevent/event.py", line 286, in gevent._event.AsyncResult.get
File "src/gevent/event.py", line 266, in gevent._event.AsyncResult._raise_exception
File "/home/omkars/Desktop/lib/python3.6/site-packages/gevent/_compat.py", line 47, in reraise
raise value.with_traceback(tb)
File "/home/omkars/Desktop/lib/python3.6/site-packages/gevent/threadpool.py", line 281, in _worker
value = func(*args, **kwargs)
socket.gaierror: [Errno -2] Name or service not known