39 lines
926 B
Python
39 lines
926 B
Python
import asyncio
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import traceback
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import collections
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class EventEmitter:
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def __init__(self):
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self._events = collections.defaultdict(list)
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self.loop = asyncio.get_event_loop()
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def emit(self, event, *args, **kwargs):
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if event not in self._events:
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return
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for cb in self._events[event]:
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# noinspection PyBroadException
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try:
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if asyncio.iscoroutinefunction(cb):
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asyncio.ensure_future(cb(*args, **kwargs), loop=self.loop)
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else:
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cb(*args, **kwargs)
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except:
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traceback.print_exc()
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def on(self, event, cb):
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self._events[event].append(cb)
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return self
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def off(self, event, cb):
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self._events[event].remove(cb)
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if not self._events[event]:
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del self._events[event]
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return self
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# TODO: add .once
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