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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 _create_cache_filename(self, cache_dir=None, **kwargs):
 """Create filename for the cached resampling parameters"""

        cache_dir = cache_dir or '.'
        hash_str = self.get_hash(**kwargs)

        return os.path.join(cache_dir, 'resample_lut-' + hash_str + '.npz')