PyQt4初试

>>> from PyQt4 import QtGui
>>> import sys
>>> app = QtGui.QApplication(sys.argv)
>>> widget = QtGui.QWidget()
>>> widget.resize(400,300)
>>> widget.show()
>>> widget.raise_()
>>> button = QtGui.QPushButton("button")
>>> button.show()
>>> button.deleteLater()
>>> button.show()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: wrapped C/C++ object of type QPushButton has been deleted

>>> button = QtGui.QPushButton("button")
>>> button.show()
>>> button.deleteLater()
>>> button = QtGui.QPushButton("button",parent=widget)
>>> button.show()
>>> button.pos()
PyQt4.QtCore.QPoint()
>>> button.move(30,40)
>>> button.pos()
PyQt4.QtCore.QPoint(30, 40)