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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 diff_jid(jid, config='root'):
    '''
    Returns the changes applied by a `jid`

    jid
        The job id to lookup

    config
        Configuration name.

    CLI Example:

    .. code-block:: bash

        salt '*' snapper.diff_jid jid=20160607130930720112
    '''
    pre_snapshot, post_snapshot = _get_jid_snapshots(jid, config=config)
    return diff(config, num_pre=pre_snapshot, num_post=post_snapshot)