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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 connect_to_region(region_name):
 """ Establish connection to AWS API. """

    logging.debug("Connecting to AWS region '%s'" % region_name)
    con = boto.vpc.connect_to_region(region_name)
    if not con:
        raise VpcRouteSetError("Could not establish connection to "
                               "region '%s'." % region_name)
    return con