from helper import adjust_filename from PySide import QtGui, QtCore from PySide.QtUiTools import QUiLoader class View_1(QtGui.QWidget): def __init__(self): QtGui.QWidget.__init__(self) loader = QUiLoader() widget = loader.load(adjust_filename('bug_552.ui', __file__), self) self.children = [] for child in widget.findChildren(QtCore.QObject, None): self.children.append(child) self.t = widget.tabWidget self.t.removeTab(0) app = QtGui.QApplication([]) window = View_1() window.show() # If it doesn't crash it works :-)