def deploy_service_registry_and_set_urls(
    private_keys, web3, contract_manager, service_registry_address
) -> Tuple[ServiceRegistry, List[str]]:
    urls = ["http://foo", "http://boo", "http://coo"]
    c1_client = JSONRPCClient(web3, private_keys[0])
    c1_service_proxy = ServiceRegistry(
        jsonrpc_client=c1_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c2_client = JSONRPCClient(web3, private_keys[1])
    c2_service_proxy = ServiceRegistry(
        jsonrpc_client=c2_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c3_client = JSONRPCClient(web3, private_keys[2])
    c3_service_proxy = ServiceRegistry(
        jsonrpc_client=c3_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )

    # Test that getting a random service for an empty registry returns None
    pfs_address = get_random_service(c1_service_proxy, "latest")
    assert pfs_address is None

    # Test that setting the urls works
    c1_service_proxy.set_url(urls[0])
    c2_service_proxy.set_url(urls[1])
    c3_service_proxy.set_url(urls[2])

    return c1_service_proxy, urls
def _search_and(self, base, search_filter, candidates=None):
        # Load the data from the directory, if we aren't passed any
        if candidates == [] or candidates is None:
            candidates = self.directory
        this_filter = list()

        index = 0
        search_filter.remove("&")
        for condition in search_filter:
            if not isinstance(condition, list):
                this_filter.append(condition)
            index +=1

        # Remove this_filter items from search_filter list
        for condition in this_filter:
            search_filter.remove(condition)

        try:
            search_filter = list(search_filter[0])
            for sub_filter in search_filter:
                if not isinstance(sub_filter, list):
                    candidates = self.operation.get(sub_filter)(base,
                                                                search_filter,
                                                                candidates)
                else:
                    candidates = self.operation.get(sub_filter[0])(base,
                                                                   sub_filter,
                                                                   candidates)
        except IndexError:
            pass

        for item in this_filter:
            if ">=" in item:
                k, v = item.split(">=")
                candidates = Connection._match_greater_than_or_equal(base, k, v,
                                                                     candidates)
            elif "<=" in item:
                k, v = item.split("<=")
                candidates = Connection._match_less_than_or_equal(base, k, v,
                                                                  candidates)
            # Emulate AD functionality, same as "="
            elif "~=" in item:
                k, v = item.split("~=")
                candidates = Connection._match_equal_to(base, k, v,
                                                         candidates)
            elif "=" in item:
                k, v = item.split("=")
                candidates = Connection._match_equal_to(base, k, v,
                                                         candidates)
        return candidates