def _update_value ( self, event ):
        self._update( event.GetString() )
Compute extended GCD of ``a`` and ``b``.
dataset/ETHPy150Open enthought/traitsui/traitsui/wx/history_control.py/HistoryControl._update_value--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/polys/domains/pythonintegerring.py/PythonIntegerRing.gcdex