py2neo訪問neo4j時報timeout

錯誤的異常棧爲：

File "/usr/local/python27/lib/python2.7/site-packages/py2neo/cypher/core.py", line 136, in execute
    results = tx.commit()
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/cypher/core.py", line 333, in commit
    return self.post(self.__commit or self.__begin_commit)
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/cypher/core.py", line 275, in post
    rs = resource.post({"statements": self.statements})
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/core.py", line 307, in post
    response = self.__base.post(body, headers, **kwargs)
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 984, in post
    return rq.submit(**kwargs)
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 433, in submit
    http, rs = submit(self.method, uri, self.body, self.headers)
  File "/usr/local/python27/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 362, in submit
    raise SocketError(code, description, host_port=uri.host_port)
py2neo.packages.httpstream.http.SocketError: timed out

顯然這是http鏈接發生超時，可能的原因是查圖庫時查詢速度過慢一直沒有響應。解決方法爲，設置超時時間。引入：

from py2neo.packages.httpstream import http
http.socket_timeout = 9999

參考資料：
stackoverflow