fromstring() has been removed

[grisu48]

Generation of CR codes based on Texts failes with the following Traceback

Traceback (most recent call last):
  File "/usr/share/qreator/qreator/QreatorWindow.py", line 512, in on_qr_drawingarea_draw
    output_type=QRCodeOutput.CAIRO_SURFACE)
  File "/usr/share/qreator/qreator/QRCode.py", line 61, in encode
    border)
  File "/usr/share/qreator/qreator/QRCode.py", line 70, in _encode_to_cairo
    current_color_bg, previous_color_bg, border)
  File "/usr/share/qreator/qreator/QRCode.py", line 94, in _encode_to_pil
    version, self.qrcode_size, self.image = qrencode.encode(text)
  File "/usr/lib/python2.7/dist-packages/qrencode/__init__.py", line 47, in encode
    im = Image.fromstring('L', (size, size), data)
  File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 2063, in fromstring
    "Please call frombytes() instead.")
Exception: fromstring() has been removed. Please call frombytes() instead.
Traceback (most recent call last):
  File "/usr/share/qreator/qreator/QreatorWindow.py", line 512, in on_qr_drawingarea_draw
    output_type=QRCodeOutput.CAIRO_SURFACE)
  File "/usr/share/qreator/qreator/QRCode.py", line 61, in encode
    border)
  File "/usr/share/qreator/qreator/QRCode.py", line 70, in _encode_to_cairo
    current_color_bg, previous_color_bg, border)
  File "/usr/share/qreator/qreator/QRCode.py", line 94, in _encode_to_pil
    version, self.qrcode_size, self.image = qrencode.encode(text)
  File "/usr/lib/python2.7/dist-packages/qrencode/__init__.py", line 47, in encode
    im = Image.fromstring('L', (size, size), data)
  File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 2063, in fromstring
    "Please call frombytes() instead.")
Exception: fromstring() has been removed. Please call frombytes() instead.