William Harley

# create the subnet with the existing names.
def subnet(
    one: Float, 
    two: Float, 
    # three: Float, 
    four: Float,
    five: Float,
):
    one = Float()
    
subnetnode = graph.addSubnet(subnet, 'mySubnet')

node = graph.addOrUpdateNode(
    callback='AbstractControl',
    name='test',
)

# find the ports of the existing subnet
ports = graph.findPorts('mySubnet:*[in]')

# loop over the list
for port in ports:
    portname = port.data()
    # create a null to set the types for the outputs
    node.promoteNodeInput(
        portname='__spare__',
        parmname=portname,
    )
    # connect the output of the abstract control to an existing subnet
    graph.findAndConnectInput(
        srcnode=node,
        srcname=portname,
        dstnode=subnetnode,
        dstname=portname,
        )

node = graph.AddOrUpdateNode(
    callback='AbstractControl',
    name='test',
)
# create you list
list = ['one', 'two', 'three', 'four']
nulls = ApexNodeIDArray()
# loop over the list
for i in list:
    # create a null to set the types for the outputs
    null = graph.AddOrUpdateNode(
        callback='Null<Float>',
        name=f'null_{i}',
    )
    
    # promote the ports, NB the type of parm inputs are defined 
    # be the connected port. simply promoting them does not give them
    # a type.
    node.promoteNodeInput(
        portname='__spare__',
        parmname=i,
        )

    # Find the new port based on the new name.
    port = node.findPort(f'{i}[out]')
    
    # connect the port to the float null, This will now set the type for 
    # all the ports on the parm and abstract control
    port.connect(null.value_in)
    
    # add the nulls to the nulls array
    nulls.append(null)
# pack the loose nulls into a neat subnet
graph.packSubnet('mySubnet', nulls)