文件拆分代码：
python" id="highlighter_310168">
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#-*-encoding:utf-8-*- import osimport sysimport threading def getfilesize(file): file.seek(0, os.seek_end) filelength = file.tell() file.seek(0, 0) return filelength def dividefile(): filefullpath = r"%s" % raw_input("file path: ").strip("\"") dividetotalpartscount = int(raw_input("how many parts do you like to divide?: ")) if os.path.exists(filefullpath): file = open(filefullpath, 'rb') filesize = getfilesize(file) file.close() # send file content for i in range(dividetotalpartscount): filepartsender = threading.thread(target=seperatefilepart, args=(filefullpath, dividetotalpartscount, i+1, filesize)) filepartsender.start() for i in range(dividetotalpartscount): sem.acquire() os.remove(filefullpath) else: print "file doesn't exist" def seperatefilepart(filefullpath, dividetotalpartscount, threadindex, filesize): try: # calculate start position and end position filepartsize = filesize / dividetotalpartscount startposition = filepartsize * (threadindex - 1) #print "thread : %d, startposition: %d" % (threadindex, startposition) endposition = filepartsize * threadindex - 1 if threadindex == dividetotalpartscount: endposition = filesize - 1 filepartsize = filesize - startposition file = open(filefullpath, "rb") file.seek(startposition) filepartname = filefullpath + ".part" + str(threadindex) filepart = open(filepartname, "wb") lengthwritten = 0 while lengthwritten < filepartsize: buflen = 1024 lengthleft = filepartsize - lengthwritten if lengthleft < 1024: buflen = lengthleft buf = file.read(buflen) filepart.write(buf) lengthwritten += len(buf) filepart.close() file.close() sem.release() print "part %d finished, size %d" % (threadindex, filepartsize) except exception, e: print e sem = threading.semaphore(0)while true: dividefile() |
文件重组代码：
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#-*-encoding:utf-8-*-import osdef getfilesize(file): file.seek(0, os.seek_end) filelength = file.tell() file.seek(0, 0) return filelength def rebuildfile(): filefullpath = r"%s" % raw_input("file base path: ").strip("\"") dividetotalpartscount = int(raw_input("how many parts have you divided?: ")) file = open(filefullpath, "wb") for i in range(dividetotalpartscount): filepartname = filefullpath + ".part" + str(i+1) filepart = open(filepartname, "rb") filepartsize = getfilesize(filepart) lengthwritten = 0 while lengthwritten < filepartsize: buflen = 1024 buf = filepart.read(buflen) file.write(buf) lengthwritten += len(buf) filepart.close() os.remove(filepartname) file.close() while true: rebuildfile() |
拆分文件演示：
源文件：
拆分：
拆分后文件：
重组文件：
重组后文件：
以上这篇python文件拆分与重组实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qwertyupoiuytr/article/details/66616934
