MorphOS ISO to UTF

#!python
from subprocess import call,PIPE
from os import getcwd,walk,path,system
from sys import argv

error_string = "use conv --from-django or --to-django to convert files"
directory = getcwd()
national_code = "ISO8859-2"
file_extension = ".py"
temp = "RAM:temp_file"

try:
    opts = argv[1]
except IndexError:
    pass


def parse(f,t):
    cfiles = [path.join(root, filename)
            for root, dirnames, filenames in walk(directory)
            for filename in filenames if filename.endswith(file_extension)]
    for orgfile in cfiles:
        print "Processing {0} file ".format(orgfile)
        system("iconv -f {0} -t {1} {2} > {3}".format(f,t,orgfile,temp))
        system("copy {0} {1}".format(temp,orgfile))
    system("delete {0}".format(temp))

try:
    if opts == "--from-django":
        f =  "utf-8"
        t =  national_code
        parse(f,t)
    elif opts == "--to-django":
        t =  "utf-8"
        f =  national_code
        parse(f,t)
    else:
        print error_string
except NameError:
    print  error_string