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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_valid_filename(s):
 """ like the regular get_valid_filename, but also slugifies away umlauts and stuff. """

    s = get_valid_filename_django(s)
    filename, ext = os.path.splitext(s)
    filename = slugify(filename)
    ext = slugify(ext)
    if ext:
        return "%s.%s" % (filename, ext)
    else:
        return "%s" % (filename,)