<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_value(self, column=0, row=0):
 """ Returns a the value at column, row. """

        x = self._widget.item(row, column)

        if x==None: return x
        else:       return str(self._widget.item(row,column).text())