01 Oct 2019
How to convert a QByteArray to unicode to be able to save it in a text file using Python.
When working with Qt it is possible to save and restore some widget state using saveState and restoreState method. Calling saveState return a QByteArray. How can I write this QByteArray to a text file and reload it after ?
import json
from PyQt5 import QtWidgets, QtCore
# create a widget to save the state
my_window = QtWidgets.QMainWindow()
qbyte_array = my_window.saveState()
codec = QtCore.QTextCodec.codecForName("UTF-16")
unicode_str = codec.toUnicode(qbyte_array)
to_write = json.dumps({'widget_sate': unicode_str}, indent=4)
text_encoder = codec.makeEncoder(QtCore.QTextCodec.IgnoreHeader)
qbyte_array = text_encoder.fromUnicode(unicode_str)
my_window.restoreState(qbyte_array)