Hello,Why can’t I fill universe1 into cell4? (‘cell4.fill=u1’ in universe_bug.py) In universe_bug.py, I filled cell4 with the defined universe, named u1. But when I run openmc, I get an error message in bug.png photo.
I translated it according to the MCNP example editing card. In MCNP, the cell can fill the universe, but why is OpenMC not working? Or is there a mistake in my writing? Please help me, thank you.
universe_bug.py (2.07 KB)
corrected.py (1.99 KB)
Based on the error in bug.png,the problem is that the cells parameter accepts an iterable of cells. It looks like you tried to make cell4 a tuple so that it was iterable by adding parentheses around it. However, to make a Tuple from one entry, Python requires you to add a comma after the entry. In other words, this should be written as (cell4,). The comma is necessary as thats the cleanest way to tell the Python interpreter that you didn’t just mean parentheses.
So in summary, root=openmc.Universe(cells=(cell4)) should instead be:
root=openmc.Universe(cells=(cell4,)) OR
root=openmc.Universe(cells=tuple(cell4)) OR
root=openmc.Universe(cells=[cell4])…
Hope this helps
