How to use the pyqpanda.pyQPanda.CreateIfProg function in pyqpanda

def CreateIfProg(classical_condition, 
                true_branch,
                false_branch=None):
    """
    `QPanda Basic API` \n
    Create a q-if subprogram \n
    (ClassicalCondition,QNode,QNode) -> QProg 
    QNode = QProg | QCircuit | QGate 
    """
    if false_branch is None:
        return pyQPanda.CreateIfProg(classical_condition,
            true_branch)
    else:
        return pyQPanda.CreateIfProg(classical_condition,
            true_branch, false_branch)

def CreateIfProg(classical_condition, 
                true_branch,
                false_branch=None):
    """
    `QPanda Basic API` \n
    Create a q-if subprogram \n
    (ClassicalCondition,QNode,QNode) -> QProg 
    QNode = QProg | QCircuit | QGate 
    """
    if false_branch is None:
        return pyQPanda.CreateIfProg(classical_condition,
            true_branch)
    else:
        return pyQPanda.CreateIfProg(classical_condition,
            true_branch, false_branch)