@spiceErrorCheck<EOL>def card(cell):
return libspice.card_c(ctypes.byref(cell))<EOL>
Return the cardinality (current number of elements) in a
cell of any data type.

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

:param cell: Input cell.
:type cell: spiceypy.utils.support_types.SpiceCell
:return: the number of elements in a cell of any data type.
:rtype: int