python实现文件的分割与合并

使用python来进行文件的分割与合并是非常简单的。

python代码如下：

splitfile--将文件分割成大小为chunksize的块；

mergefile--将众多文件块合并成原来的文件；

# coding=utf-8
import os,sys
reload(sys)
sys.setdefaultencoding('utf-8')
 
class fileoperationbase:
 def __init__(self,srcpath, despath, chunksize = 1024):
 self.chunksize = chunksize
 self.srcpath = srcpath
 self.despath = despath
 
 def splitfile(self):
 'split the files into chunks, and save them into despath'
 if not os.path.exists(self.despath):
 os.mkdir(self.despath)
 chunknum = 0
 inputfile = open(self.srcpath, 'rb') #rb 读二进制文件
 try:
 while 1:
 chunk = inputfile.read(self.chunksize)
 if not chunk: #文件块是空的
 break
 chunknum += 1
 filename = os.path.join(self.despath, ("part--%04d" % chunknum))
 fileobj = open(filename, 'wb')
 fileobj.write(chunk)
 except ioerror:
 print "read file error\n"
 raise ioerror
 finally:
 inputfile.close()
 return chunknum
 
 def mergefile(self):
 '将src路径下的所有文件块合并，并存储到des路径下。'
 if not os.path.exists(self.srcpath):
 print "srcpath doesn't exists, you need a srcpath"
 raise ioerror
 files = os.listdir(self.srcpath)
 with open(self.despath, 'wb') as output:
 for eachfile in files:
 filepath = os.path.join(self.srcpath, eachfile)
 with open(filepath, 'rb') as infile:
 data = infile.read()
 output.write(data)
 
#a = "c:\users\justyoung\desktop\unix报告作业.docx".decode('utf-8')
#test = fileoperationbase(a, "c:\users\justyoung\desktop\splitfile\est", 1024)
#test.splitfile()
#a = "c:\users\justyoung\desktop\splitfile\est"
#test = fileoperationbase(a, "out")
#test.mergefile()

程序注释部分是使用类的对象的方法。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。