problemo/solverwrap.py
def Ainv(self):
        'Returns a Solver instance'

        if not hasattr(self, '_Ainv'):
            self._Ainv = self.Solver(self.A)
        return self._Ainv
def Ainv(self):
        'Returns a Solver instance'

        if not hasattr(self, '_Ainv'):
            self._Ainv = self.Solver(self.A)
        return self._Ainv
Returns a Solver instance