@spiceErrorCheck<EOL>def appndd(item, cell):
assert isinstance(cell, stypes.SpiceCell)<EOL>if hasattr(item, "<STR_LIT>"):<EOL><INDENT>for d in item:<EOL><INDENT>libspice.appndd_c(ctypes.c_double(d), cell)<EOL><DEDENT><DEDENT>else:<EOL><INDENT>item = ctypes.c_double(item)<EOL>libspice.appndd_c(item, cell)<EOL><DEDENT>
Append an item to a double precision cell.

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

:param item: The item to append.
:type item: Union[float,Iterable[float]]
:param cell: The cell to append to.
:type cell: spiceypy.utils.support_types.SpiceCell