import sys  

import os  

import bz2  

from bz2 import decompress  

path =  "M:/data/CMORPH_V1.0/unzip_example/zip"  

un_path="M:/data/CMORPH_V1.0/unzip_example/unzip"  

for(dirpath,dirnames,files)in os.walk(path):  

   for filename in files:  

       filepath = os.path.join(dirpath, filename)  

       newfilepath = os.path.join(un_path, filename.split('.')[0]+filename.split('.')[1])  

       with open(newfilepath, 'wb') as new_file, bz2.BZ2File(filepath, 'rb') as file:  

           for data in iter(lambda : file.read(100 * 1024), b''):  

               new_file.write(data)