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最近想从NCBI下载一批数据，由于数据量较大需要下载好几天，发现我的python脚本只能运行一两个小时就会断开，请问各位高人，应该怎么解决那？
这是错误信息；
Traceback (most recent call last):
File "download.py", line 44, in <module>
File "download.py", line 14, in ftp_download
File "/usr/lib/python3.5/ftplib.py", line 441, in retrbinary
with self.transfercmd(cmd, rest) as conn:
File "/usr/lib/python3.5/ftplib.py", line 398, in transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "/usr/lib/python3.5/ftplib.py", line 360, in ntransfercmd
source_address=self.source_address)
File "/usr/lib/python3.5/socket.py", line 711, in create_connection
raise err
File "/usr/lib/python3.5/socket.py", line 702, in create_connection
sock.connect(sa)
TimeoutError: [Errno 110] Connection timed out
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