import codecs

 import codecs

 import vobject

 import vobject

 import StringIO

 import StringIO

 import qrcode

 import qrcode

 from docutils.core import publish_parts

 from docutils.core import publish_parts

 from flask import Flask

 from flask import Flask

 from flask import render_template

 from flask import render_template

 from flask import request

 from flask import request