def __init__(self, prefix, routes):
        assert prefix.startswith('/') and not prefix.endswith('/'), \
            'Path prefixes must start with a slash but not end with a slash.'
        super(PathPrefixRoute, self).__init__(prefix, routes)
Try to create duplicate name keypair.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/webapp2-2.3/webapp2_extras/routes.py/PathPrefixRoute.__init__--crossover with--dataset/ETHPy150Open dtroyer/python-openstackclient/functional/tests/compute/v2/test_keypair.py/KeypairTests.test_keypair_create_duplicate