python简单分割文件的方法

#!/usr/bin/env pythondef split(filename, size):  fp = open(filename, 'rb')  i = 0  n = 0  temp = open(filename+'.part'+str(i),'wb')  buf = fp.read(1024)  while(True):    temp.write(buf)    buf = fp.read(1024)    if(buf == ''):      print filename+'.part'+str(i)+';'      temp.close()      fp.close()      return    n += 1    if(n == size):      n = 0      print filename+'.part'+str(i)+';'      i += 1      temp.close()      temp = open(filename+'.part'+str(i),'wb')if __name__ == '__main__':  name = raw_input('input filename:')  split(name, 307200) #分割后每个文件300M