`string argument expected, got 'bytes'`

[n3s7or]

In Python 3.8.5 I have the following issue:

Having the following code snippet:

import io
import qrcode
import qrcode.image.svg

factory = qrcode.image.svg.SvgFillImage
qr_img = qrcode.make("Hola Mundo!", image_factory=factory)

with io.StringIO() as text:
    qr_img.save(text)
    qr_svg = text.getvalue()

Note I am trying to get a str object as a response.

When that code is executed the following error raises:

Traceback (most recent call last):
  File "qr_snippet.py", line 9, in <module>
    qr_img.save(text)
  File "/home/nestor/.venv/dcpt38/lib/python3.8/site-packages/qrcode/image/svg.py", line 42, in save
    self._write(stream)
  File "/home/nestor/.venv/dcpt38/lib/python3.8/site-packages/qrcode/image/svg.py", line 89, in _write
    ET.ElementTree(self._img).write(stream, encoding="UTF-8",
  File "/usr/lib/python3.8/xml/etree/ElementTree.py", line 772, in write
    serialize(write, self._root, qnames, namespaces,
  File "/usr/lib/python3.8/xml/etree/ElementTree.py", line 937, in _serialize_xml
    _serialize_xml(write, e, qnames, None,
  File "/usr/lib/python3.8/xml/etree/ElementTree.py", line 931, in _serialize_xml
    write(" %s=\"%s\"" % (qnames[k], v))
TypeError: string argument expected, got 'bytes'