@cache_readonly<EOL><INDENT>def nbytes(self):<DEDENT>
return sum(getsizeof(getattr(self, v), <NUM_LIT>) for v in<EOL>['<STR_LIT>', '<STR_LIT>', '<STR_LIT>'])<EOL>
Return the number of bytes in the underlying data
On implementations where this is undetermined (PyPy)
assume 24 bytes for each value