def usermanager():
global window
window = QDialog()
userMgr = UserManager.Ui_Dialog()
userMgr.setupUi(window)
view = userMgr.tableUser
model = QSqlTableModel()
view.setModel(model)
model.setTable('USER')
model.select()
model.setHeaderData(0, Qt.Horizontal, '用户名')
model.setHeaderData(1, Qt.Horizontal, '密码')
model.setHeaderData(2, Qt.Horizontal, '用户权限')
window.show()
