@spiceErrorCheck<EOL>def wnexpd(left, right, window):
assert isinstance(window, stypes.SpiceCell)<EOL>assert window.dtype == <NUM_LIT:1><EOL>left = ctypes.c_double(left)<EOL>right = ctypes.c_double(right)<EOL>libspice.wnexpd_c(left, right, ctypes.byref(window))<EOL>return window<EOL>
Expand each of the intervals of a double precision window.

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

:param left: Amount subtracted from each left endpoint. 
:type left: float
:param right: Amount added to each right endpoint. 
:type right: float
:param window: Window to be expanded. 
:type window: spiceypy.utils.support_types.SpiceCell
:return: Expanded Window.
:rtype: spiceypy.utils.support_types.SpiceCell