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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 init(opts):
    '''
    Perform any needed setup.
    '''
    if CONFIG_BASE_URL in opts['proxy']:
        CONFIG[CONFIG_BASE_URL] = opts['proxy'][CONFIG_BASE_URL]
    else:
        log.error('missing proxy property %s', CONFIG_BASE_URL)
    log.debug('CONFIG: %s', CONFIG)