def __init__(self, username, password, erase_on_connect=False):
        self.username = username
        self.password = password
        self.erase_on_connect = erase_on_connect
Macros need to be runnable on lists of things.  Make sure the handler
dataset/ETHPy150Open pika/pika/pika/credentials.py/PlainCredentials.__init__--crossover with--dataset/ETHPy150Open twisted/nevow/nevow/test/test_athena.py/UtilitiesTests.test_handlerMacroAgainstList