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20 lines
578 B
Python
20 lines
578 B
Python
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from abc import ABCMeta, abstractmethod
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import six
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class BaseTrigger(six.with_metaclass(ABCMeta)):
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"""Abstract base class that defines the interface that every trigger must implement."""
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__slots__ = ()
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@abstractmethod
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def get_next_fire_time(self, previous_fire_time, now):
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"""
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Returns the next datetime to fire on, If no such datetime can be calculated, returns
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``None``.
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:param datetime.datetime previous_fire_time: the previous time the trigger was fired
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:param datetime.datetime now: current datetime
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"""
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