File "electrum/gui/qt/qrcodewidget.py", line 62, in paintEvent
  File "qrcode/main.py", line 428, in get_matrix
  File "qrcode/main.py", line 93, in make
  File "qrcode/main.py", line 150, in best_fit
  File "qrcode/main.py", line 17, in _check_version