def disconnect(layer: Layer, instruction: Instruction):
if len(instruction.details) > 1:
print("\nWRONG DISCONNECT INSTRUCTION FORMAT.")
raise Exception
port = str.split(instruction.details[0], '_')
layer.disconnect(instruction.time, port[0], int(port[1]) - 1)
write(instruction.time,
"disconnect, device={}, port={}\n".format(port[0], port[1]))
