A ConCat in Python

concat.py

#I need a python script that will cat 
#all of the *.html files in a single level directory
#  into one file: newfile.html

import glob
import shutil

html_files = glob.glob('*.html')

with open('newfile.html', 'wb') as outfile:
   for filename in html_files:
       if filename == 'newfile.html':
           # don't want to copy the output into the output
           continue
       with open(filename, 'rb') as readfile:
           shutil.copyfileobj(readfile, outfile)