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 _plot_surface(ax, x, y, z, labels, azim=None):
    """helper function for surface plots"""
    # ax.tick_params(axis='both', which='major', pad=-3)
    assert np.size(x) > 1 and np.size(y) > 1 and np.size(z) > 1
    if azim is not None:
        ax.azim = azim
    X, Y = np.meshgrid(x, y)
    Z = np.ma.masked_invalid(z)
    ax.plot_surface(X, Y, Z,
                    rstride=1, cstride=1,
                    cmap=cm.viridis, alpha=0.85,
                    vmin=np.nanmin(z), vmax=np.nanmax(z),
                    linewidth=0, antialiased=True)