import typing

import opcua


def get_value(hmi_opcua: opcua.Client, tag: str) -> typing.Any:
    root = hmi_opcua.get_root_node()

    for child in root.get_child(["0:Objects", "1:HmiRuntime", "1:HMI_RT_4", "1:Tags"]).get_children():
        name = child.get_browse_name().Name.split("::")[1]
        if name == tag:
            return child.get_value()

    raise ValueError(f"Could not find {tag}")



# simulated MTP700 with activated OPCUA
client = opcua.Client("opc.tcp://127.0.0.1:4949")
client.session_timeout = 600000
client.connect()


print("Tag in position:", get_value(client, "Tag_in_pos"))
client.disconnect()