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						How does the pycurl of python3 judge that the download is complete and start a download
						
 dozens of jar packages. Skip if it exists, otherwise download. 
 how does the pycurl of python3 determine that the current file has been downloaded? 
 then start downloading the next one. 
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						The following error occurred in pycurl under Centos
						
 pycurl: libcurl link-time version (7.29.0) is older than compile-time version (7.36.0) 
 the following solutions have been tried online and do not work.  pip3 uninstall pycurl  export PYCURL_SSL_LIBRARY=nss  pip3 install pycurl  still continues to repor...
						
					 
										MySQL Query :  SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5 
 MySQL Error : Disk full (/tmp/#sql-temptable-64f5-436dd18-4ed7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device") 
 MySQL Errno : 1021 
 Message :  Disk full (/tmp/#sql-temptable-64f5-436dd18-4ed7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device") 
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