python文件拆分与重组实例文件拆分与重组实例
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文件拆分代码:文件拆分代码:
#-*-encoding:utf-8-*-
import os
import sys
import 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)