Auto format byte array in QLineEdit

Question

I want that my QLineEdit to insert a space after every two characters, I want his because in that QLineEdit I will insert on hexadecimal character. I tried the code from below from this post: PyQt auto-space qlineedit characters and it's work very well but when I want to delete a characters it work only when occurs the last space, and then I can't delete anything.

from PyQt5.QtWidgets import QLineEdit, QApplication

class LineEdit(QLineEdit):
    def  __init__(self, *args, **kwargs):
        QLineEdit.__init__(self, *args, **kwargs)
        self.textChanged.connect(self.onTextChanged)
        self.setValidator(QRegExpValidator(QRegExp("(\\d+)")))

    def onTextChanged(self, text):
        if len(text) % 6 == 5:
            self.setText(self.text()+" ")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    le = LineEdit()
    le.show()
    sys.exit(app.exec_())

Answer 1

If you need to use this class multiple times I think the best way is to inherit a custom class from QLineEdit (like you already did) but add setInputMask() to it.

Try this:

from PyQt5.QtWidgets import QLineEdit, QApplication
import sys

class HexLineEdit(QLineEdit):
    def  __init__(self, *args, **kwargs):
        QLineEdit.__init__(self, *args, **kwargs)
        self.setInputMask("HH HH HH HH")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    le = HexLineEdit()
    le.show()
    sys.exit(app.exec_())