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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 discrete(cats, name='discrete'):
 """Return a class category that shows the encoding"""

    import json
    ks = list(cats)
    for key in ks:
        if isinstance(key, bytes):
            cats[key.decode('utf-8')] = cats.pop(key)
    return 'discrete(' + json.dumps([cats, name]) + ')'