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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 _bin_from_dict(d):
 """ Given a dictionary yielded by the parser, return the genomic "UCSC" bin """

    try:
        start = int(d['start'])
        end = int(d['end'])
        return bins.bins(start, end, one=True)

    # e.g., if "."
    except ValueError:
        return None