qiskit/circuit/quantumcircuit.py
def _attach(self, instruction, qargs, cargs):
        """DEPRECATED after 0.8"""
        self.append(instruction, qargs, cargs)
def _attach(self, instruction, qargs, cargs):
        """DEPRECATED after 0.8"""
        self.append(instruction, qargs, cargs)
DEPRECATED after 0.8