@spiceErrorCheck<EOL>def wncard(window):
assert isinstance(window, stypes.SpiceCell)<EOL>return libspice.wncard_c(window)<EOL>
Return the cardinality (number of intervals) of a double
precision window.

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

:param window: Input window 
:type window: spiceypy.utils.support_types.SpiceCell
:return: the cardinality of the input window.
:rtype: int