def match_one(self, start_node=None, rel_type=None, end_node=None, bidirectional=False):
        rels = list(self.match(start_node, rel_type, end_node,
                               bidirectional, 1))
        if rels:
            return rels[0]
        else:
            return None
Create the salt proxy file and start the proxy process
dataset/ETHPy150Open nigelsmall/py2neo/py2neo/database/__init__.py/Graph.match_one--crossover with--dataset/ETHPy150Open saltstack/salt/salt/states/salt_proxy.py/configure_proxy