Python Script to create Python Scripts

This little python script is inspired from its ruby script equivalent found in the book Practical Ruby for System Administration, where the author created a script to create ruby scripts. The point of the script is to automate the tedious steps of creating a file, inserting the SHE-BANG line and making it executable. The original ruby version is more elegant, but I'm not that experienced in Python; so maybe there's room for improvements... suggestions welcome.

#!/usr/bin/env python

import sys,os,tkFileDialog

try:    path = sys.argv[1]
except: path = tkFileDialog.asksaveasfilename()

if not path:
    print "must specify a filename"
    exit(1)

f = open(path, "w")
f.write("#!/usr/bin/env python\n\n")
os.fchmod(f.fileno(), 0755)
f.close

os.system("/usr/bin/open " + path)