@spiceErrorCheck<EOL>def ordd(item, inset):
assert isinstance(inset, stypes.SpiceCell)<EOL>assert inset.is_double()<EOL>item = ctypes.c_double(item)<EOL>return libspice.ordd_c(item, ctypes.byref(inset))<EOL>
The function returns the ordinal position of any given item in a
double precision set.  If the item does not appear in the set, the
function returns -1.

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/ordd_c.html

:param item: An item to locate within a set.
:type item: float
:param inset: A set to search for a given item.
:type inset: SpiceDoubleCell
:return: the ordinal position of item within the set
:rtype: int