@spiceErrorCheck<EOL>def lcase(instr, lenout=_default_len_out):
instr = stypes.stringToCharP(instr)<EOL>lenout = ctypes.c_int(lenout)<EOL>outstr = stypes.stringToCharP(lenout)<EOL>libspice.lcase_c(instr, lenout, outstr)<EOL>return stypes.toPythonString(outstr)<EOL>
Convert the characters in a string to lowercase.

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

:param instr: Input string.
:type instr: str
:param lenout: Maximum length of output string.
:type lenout: int
:return: Output string, all lowercase.
:rtype: str