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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_bandfilenames(self, **options):
 """Get filename for each band"""

        conf = options[self.platform_name + '-viirs']

        rootdir = conf['rootdir']
        for section in conf:
            if not section.startswith('section'):
                continue
            bandnames = conf[section]['bands']
            for band in bandnames:
                filename = os.path.join(rootdir, conf[section]['filename'])
                self.bandfilenames[band] = compose(
                    filename, {'bandname': band})