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#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import sys
from PyQt4 import QtGui, QtCore
 
class Example(QtGui.QWidget):
 
    def __init__(self):
        super(Example, self).__init__()
 
        self.initUI()
 
    def initUI(self):
 
        self.table = QtGui.QTableWidget(1,1, self)
 
        item = QtGui.QTableWidgetItem()
        item.setText("")
        self.table.setItem(0,0, item)
        QtCore.QObject.connect(self.table, QtCore.SIGNAL("cellChanged(int, int)"), self.cellChange)
        self.setGeometry(300, 300, 280, 170)
        self.show()
 
    def cellChange(self, currentRow, currentColumn):
        if self.mon_validateur(self.table.item(currentRow, currentColumn).text()) != False:
            return True
 
        self.table.item(currentRow, currentColumn).setText("")
        return False
 
    def is_numeric(self, str):
        try:
            float(str)
        except (ValueError, TypeError):
            return False
 
        return True
 
    def mon_validateur(self, str):
        list_s = str.split(',')
        if len(list_s) != 2:
            return False
 
        if self.is_numeric(list_s[0]) == False or self.is_numeric(list_s[1]) == False:
            return False
 
        return True
 
def main():
 
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())
 
 
if __name__ == '__main__':
    main() | 
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