PyQt, Qtable clears column when sort is enabled

I have a bug in the following function. This function updates the table, adjusts the size of the columns, and sorts the table. But in some cases, for some rows, the text in columns 3 and 4 is empty. I found out that this is happening in the "problem code" section. What am I wrong in this section? I just want to resize for specific columns. Please help to find out the problem or show me your errors.

def print_day_worklog(self):
    logging.info('RefReshing day worklog table')
    selected_day = self.ui.dateDayWorklogEdit.date().toPyDate()
    day_work = db.get_day_worklog(self.creds[3], selected_day)
    self.ui.tableDayWorklog.setRowCount(len(day_work))
    for row, entry in enumerate(day_work):
        e0 = QtGui.QTableWidgetItem(entry[0])
        e1 = QtGui.QTableWidgetItem(entry[1])
        e2 = QtGui.QTableWidgetItem(entry[2].strftime('%H:%M'))
        e3 = QtGui.QTableWidgetItem(entry[3].strftime('%H:%M'))
        e4 = QtGui.QTableWidgetItem(utils.get_time_spent_string(entry[2],
            entry[3]))
        # debug
        print e0.text(), e1.text(), e2.text(), e3.text(), e4.text()
        self.ui.tableDayWorklog.setItem(row, 0, e0)
        self.ui.tableDayWorklog.setItem(row, 1, e1)
        self.ui.tableDayWorklog.setItem(row, 2, e2)
        self.ui.tableDayWorklog.setItem(row, 3, e3)
        self.ui.tableDayWorklog.setItem(row, 4, e4)

    # problem code starts
    self.ui.tableDayWorklog.horizontalHeader().setResizeMode(1,
        QtGui.QHeaderView.Stretch)
    for column in (0,2,3,4):
        self.ui.tableDayWorklog.resizeColumnToContents(column)
        self.ui.tableDayWorklog.horizontalHeader().setResizeMode(column,
            QtGui.QHeaderView.Fixed)
        self.ui.tableDayWorklog.horizontalHeader().setResizeMode(column,
            QtGui.QHeaderView.Fixed)
    self.ui.tableDayWorklog.sortByColumn(2,0)
    # problem code ends

      

        
        
        
      

    

Ps it looks fuzzy but this is because I am trying to catch the error