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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 _parse_json(s):
    '''
    Parse json string into JsonDict.

    >>> r = _parse_json(r'{"name":"Michael","score":95}')
    >>> r.name
    u'Michael'
    >>> r['score']
    95
    '''
    return json.loads(s, object_hook=lambda pairs: JsonDict(pairs.iteritems()))