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【Python】 Python分割文件

作者:甄码农 / 发布于2012/3/6/ 790

把大文件分割成多份小文件，测试时记得修改要分割的文件名

<div>encoding=utf-8</div>
<div></div>
import os</div>
<div></div>
<div>def splitfile(filepath,partialsize=1024*1024*10):</div>
<div>  filedir,name = os.path.split(filepath)</div>
<div>  name,ext = os.path.splitext(name)</div>
<div>  filedir = os.path.join(filedir,name)</div>
<div>  if not os.path.exists(filedir):</div>
<div>    os.mkdir(filedir)</div>
<div>   </div>
<div>  partno = 0</div>
<div>  stream = open(filepath,'rb')</div>
<div>  while True:</div>
<div>    partfilename = os.path.join(filedir,name + '_' + str(partno) + ext)</div>
<div>    print 'write start %s' % partfilename</div>
<div>    part_stream = open(partfilename,'wb')</div>
<div></div>
<div>    read_count = 0</div>
<div>    read_size = 1024*512</div>
<div>    read_count_once = 0</div>
<div>    while read_count < partialsize:</div>
<div>      read_content = stream.read(read_size)</div>
<div>      read_count_once = len(read_content)</div>
<div>      if read_count_once>0:</div>
<div>        part_stream.write(read_content)</div>
<div>      else : break</div>
<div>     </div>
<div>      read_count += read_count_once</div>
<div></div>
<div>   </div>
<div>    part_stream.close()</div>
<div>    if(read_count_once < read_size) : break</div>
<div>    partno += 1</div>
<div></div>
<div>  print 'done'</div>
<div></div>
<div></div>
if __name__ == '__main__':</div>
<div>  splitfile(r'E:\quotelogs\quote.data',1024*1024*100)</div>

试试其它关键字

　分割文件　

同语言下

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