>>> from pfs.utils.fiberids import FiberIds
>>> fdb = FiberIds()
>>> fdb.cobraIdForModulePlusCobra(2, 2)
/tigress/hassans/software/pfs_utils/python/pfs/utils/fiberids.py:170: FutureWarning: elementwise comparison failed; returning scalar instead, but in the future will perform elementwise comparison
  w = (self.boardId == boardName) & (self.cobraInModuleId == cobraInModule)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/tigress/hassans/software/pfs_utils/python/pfs/utils/fiberids.py", line 171, in cobraIdForModulePlusCobra
    return self.cobraId[w][0]
IndexError: index 0 is out of bounds for axis 0 with size 0