'Adds an input to a Transaction\'s list of inputs.
Args:
input_ (:class:`~bigchaindb.common.transaction.
Input`): An Input to be added to the Transaction.'

def add_input(self, input_):

    if (not isinstance(input_, Input)):
        raise TypeError('`input_`    must    be    a    Input    instance')
    self.inputs.append(input_)
