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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_header(results):
    '''Extracts the headers, using the first value in the dict as the template'''
    ret = ['name', ]
    values = next(iter(results.values()))
    for k, v in values.items():
        if isinstance(v, dict):
            for metric in v.keys():
                ret.append('%s:%s' % (k, metric))
        else:
            ret.append(k)
    return ret