How to check if QLineEdit() is empty in PyQt5

[Zack000]

#PyQt5 #Python
i have a QMainWindow that hold 7 QLineEdit() and a QPushButton.
i'm trying to set a FOR loop for the QPushButton(OnClick_Proceedbtn) that checks if those QLineEdit() are empty or not.
and if yes, change the empty QLineEdit() to red(background).

Thank you in Advance.