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`def create_example_net():
    # An empty network object is created, that will be filled in the next steps.
    net = pp.create_empty_network()

    #create slack nodes
    hvb = pp.create_buses(net, 2, vn_kv=110.)
    pp.create_ext_grid(net, hvb[0], s_sc_min_mva=2500, rx_min=0.3)
    pp.create_ext_grid(net, hvb[1], s_sc_min_mva=3000, rx_min=0.2)

    #create a first bus
    lb = pp.create_bus(net, vn_kv=10.)
    # we start with the transformer at the first high voltage bus
    pp.create_transformer(net, hvb[0], lb, std_type="40 MVA 110/10 kV", df=0.1)
    # define the standard types for this network
    std_types = ["70-AL1/11-ST1A 10.0", "NA2XS2Y 1x240 RM/25 6/10 kV"]
    # create several lines and busses below the first transformer
    for length, std_type in zip([1.8, 2.4, 3.6, 4.8, 4.8, 1.2], [0, 1, 0, 1, 1, 1]):
        lb = create_bus_with_line(net, lb, length_km=length, std_type=std_types[std_type])
    lb = 5
    # create several lines and busses below bus 5
    for length, std_type in zip([1.2, 3., 4.8, 3.6, 1.2, 0.6], [1, 1, 1, 0, 1, 0]):
        lb = create_bus_with_line(net, lb, length_km=length, std_type=std_types[std_type])
    # we create another the transformer (this time a 3w transformer) at the other high voltage bus
    # and connect it to bus 8
    pp.create_transformer3w(net, hvb[1], 8, lb, "63/25/38 MVA 110/10/10 kV")
    net.line.loc[net.line.index[net.line.type == "ol"], "endtemp_degree"] = 100 #overhead lines
    net.line.loc[net.line.index[net.line.type == "cs"], "endtemp_degree"] = 20 #cables

    #add constraints
    net.line["max_loading_percent"] = 50
    net.trafo["max_loading_percent"] = 50
    net.bus["max_vm_pu"] = 1.03
    net.bus["min_vm_pu"] = 0.97

    #create load and generation elements
    for bus in [3, 6, 10, 13]:
        pp.create_sgen(net, bus, p_kw=-1280, sn_kva=1280, k=1.2)
    for bus in [3, 4, 5, 6, 7, 9, 10, 11, 12, 13]:
        pp.create_load(net, bus, p_kw=3.5e3)

    # create a valid original switching state
    net.switch.closed.loc[[6, 14]] = False
    
    return net
`