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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():
 """ Lambda globals cache. """

    global sqs, logs, config
    if config is None:
        with open('config.json') as fh:
            config = json.load(fh)
    if sqs is None:
        sqs = boto3.client('sqs')
    if logs is None:
        logs = boto3.client('logs')