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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_config(**api_opts):
    '''
    Return configuration
    user passed api_opts override salt config.get vars
    '''
    config = {
        'api_sslverify': True,
        'api_url': 'https://INFOBLOX/wapi/v1.2.1',
        'api_user': '',
        'api_key': '',
    }
    if '__salt__' in globals():
        config_key = '{0}.config'.format(__virtualname__)
        config.update(__salt__['config.get'](config_key, {}))
    # pylint: disable=C0201
    for k in set(config.keys()) & set(api_opts.keys()):
        config[k] = api_opts[k]
    return config