在Windows系统中，如何python脚本实现分割合并大二进制文件，方便上传

"""To split a file, type the following commandsplit.py [filename] [chunksize in mb]To recover it back, type the following commandcopy /b [filename].part.0+[filename].part.1+[filename].part.2 [filename]"""from sys import argvimport osdef split(filename, chunksize): statinfo = os.stat(filename) print "file size: %d(mb)" % (statinfo.st_size/(1024*1024)) with open(filename, "rb") as f: index = 0 while True: chunk = f.read(chunksize) if(chunk): fn = "%s.part.%d" % (filename, index) index = index + 1 print "creating", fn with open(fn, "wb") as fw: fw.write(chunk) else: break def main(): filename = argv[1] chunksize = int(argv[2]) * 1024 * 1024 print "file name:", filename print "chunk size: %d(mb)" % (chunksize/(1024*1024)) split(filename, chunksize)main()