@spiceErrorCheck<EOL>def utc2et(utcstr):
utcstr = stypes.stringToCharP(utcstr)<EOL>et = ctypes.c_double()<EOL>libspice.utc2et_c(utcstr, ctypes.byref(et))<EOL>return et.value<EOL>
Convert an input time from Calendar or Julian Date format, UTC,
to ephemeris seconds past J2000.

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/utc2et_c.html

:param utcstr: Input time string, UTC. 
:type utcstr: str
:return: Output epoch, ephemeris seconds past J2000.
:rtype: float