stringVOEvent renders strings as bytes in Python3
For example:
<TR>
<TD>b'0'</TD>
<TD>b'34710352.0'</TD>
<TD>b'347.15'</TD>
<TD>b'35.25'</TD>
<TD>b'12.4'</TD>
<TD>b'12.4'</TD>
<TD>b'0.21612837278419839'</TD>
<TD>b'1'</TD>
</TR>