from PyQt4 import QtCore as qcore QtGui as qgui class BlinkedLineEdit

from PyQt4 import QtCore as qcore, QtGui as qgui

class BlinkedLineEdit(qgui.QLineEdit):
....
    def __init__(self, *args):
        super(BlinkedLineEdit, self).__init__(*args)
        self._orig_css = self.styleSheet()
....
    def setErrorState(self, timeout=800, css='background-color: antiquewhite'):
        self.setStyleSheet(css)
        qcore.QTimer.singleShot(timeout, self.resetErrorState)
....
    def resetErrorState(self):
        self.setStyleSheet(self._orig_css)