Adding data to QTableWidget using PyQt4 in Python

I want to add my data to a table using pyqt in python. I found that I should use setItem() function to add data to a QTableWidget and give it the row and column number and a QTableWidgetItem. I did it but when I want to display the table, it's completely empty. Maybe I made a silly mistake but please help me. Here is my code:

from PyQt4 import QtGui

class Table(QtGui.QDialog):
    def __init__(self, parent=None):
        super(Table, self).__init__(parent)
        layout = QtGui.QGridLayout() 
        self.led = QtGui.QLineEdit("Sample")
        self.table = QtGui.QTableWidget()
        layout.addWidget(self.led, 0, 0)
        layout.addWidget(self.table, 1, 0)
        self.table.setItem(1, 0, QtGui.QTableWidgetItem(self.led.text()))
        self.setLayout(layout)

if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    t = Table()
    t.show()
    sys.exit(app.exec_())