python中正确的字符串编码规范

Yes: items = ['<table>']

     for last_name, first_name in employee_list:

         items.append('<tr><td>%s, %s</td></tr>' % (last_name, first_name))

     items.append('</table>')

     employee_table = ''.join(items)

No:  employee_table = '<table>'

     for last_name, first_name in employee_list:

         employee_table += '<tr><td>%s, %s</td></tr>' % (last_name, first_name)

     employee_table += '</table>'