@spiceErrorCheck<EOL>def deltet(epoch, eptype):
epoch = ctypes.c_double(epoch)<EOL>eptype = stypes.stringToCharP(eptype)<EOL>delta = ctypes.c_double()<EOL>libspice.deltet_c(epoch, eptype, ctypes.byref(delta))<EOL>return delta.value<EOL>
Return the value of Delta ET (ET-UTC) for an input epoch.

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

:param epoch: Input epoch (seconds past J2000).
:type epoch: float
:param eptype: Type of input epoch ("UTC" or "ET").
:type eptype: str
:return: Delta ET (ET-UTC) at input epoch.
:rtype: float