creazy.txt文件有4G，逐行读取其内容并写入monday.txt文件里。 

def creazyRead():
  '''''
  with open(e:creazy.txt,r) as cr:
    for line in cr:
      print line
  '''
  ms = open(e:creazy.txt)
  for line in ms:
    with open(e:monday.txt,a) as mon:
      mon.write(line) 
另一种方法使