def __init__(self, theta, ctl, tgt, circ=None):
    'Create new rzz gate.'
    super().__init__('rzz', [theta], [ctl, tgt], circ)
Create new rzz gate.
def __init__(self, theta, ctl, tgt, circ=None):
    
    super().__init__('rzz', [theta], [ctl, tgt], circ)