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 mesh(isa, with_axis=False, ax=0):
    """plot mesh of I7/ISA7 model
    Args:
      isa: Isa7 object
    """
    from matplotlib.lines import Line2D
    if ax == 0:
        ax = plt.gca()
    ax.set_aspect('equal')
    for el in isa.elements:
        pts = [list(i) for i in zip(*[v.xy for v in el.vertices])]
        ax.add_line(Line2D(pts[0], pts[1], color='b', ls='-', lw=0.25))

    # for nc in isa.nodechains:
    #    pts = [list(i) for i in zip(*[(n.x, n.y) for n in nc.nodes])]
    #    ax.add_line(Line2D(pts[0], pts[1], color="b", ls="-", lw=0.25,
    #                       marker=".", ms="2", mec="None"))

    # for nc in isa.nodechains:
    #    if nc.nodemid is not None:
    #        plt.plot(*nc.nodemid.xy, "rx")

    ax.autoscale(enable=True)
    if not with_axis:
        ax.axis('off')