When the `integration_weights` for a readout pulse is manually set as a list of one tuple, loading the saved configuration file throws an error

[huochenQE]

When the integration_weights for a readout pulse is manually set as a list of one tuple, loading the saved configuration file throws an error:

Code to reproduce the error:

from quam.components import *
from quam.examples.superconducting_qubits import Transmon, QuAM
from quam.components.pulses import SquareReadoutPulse

machine = QuAM()

transmon = Transmon(id=0)
machine.qubits[transmon.name] = transmon

# Add resonator channel
transmon.resonator = InOutIQChannel(
    id=0,
    opx_output_I=("con1", 1),
    opx_output_Q=("con1", 2),
    opx_input_I=("con1", 1),
    opx_input_Q=("con1", 2,),
    frequency_converter_up=FrequencyConverter(
        mixer=Mixer(), local_oscillator=LocalOscillator(power=10, frequency=6e9)
    ),
)

# Create a Readout pulse
readout_pulse = SquareReadoutPulse(length=1000, amplitude=0.1, integration_weights=[(1.0, 1000)])

# Attach the pulse to the resonator of the first qubit
machine.qubits["q0"].resonator.operations["readout"] = readout_pulse

machine.save("test.json")
QuAM.load("test.json")

The error message is

{
    "name": "TypeError",
    "message": "Could not instantiate QuAM.qubits[\"q0\"].resonator.operations[\"readout\"].integration_weights with any of the types in typing.Union[typing.List[float], typing.List[typing.Tuple[float, int]]]",

[nulinspiratie]

Nice catch, this was indeed a bug. It should be fixed now, please let me know if it persists