am quite new in OceanParcels on python jupyter. When I try to run output_file = pset.ParticleFile(name="cop_particles.nc", outputdt=timedelta(hours=1))
I try to follow the tutorial https://nbviewer.org/github/OceanParcels/parcels/blob/master/parcels/examples/parcels_tutorial.ipynb
for both cases, and basically, I am stuck at line[7] for the 1st case and line[22] for the 2nd one.