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Description:

pythoneventemitter 1.0.13

python-eventemitter

A Python port of Node.js EventEmitter that supports both synchronous and asynchronous event execution
Help
See documentation for more details
Install
To install python-eventemitter, simply use pip:
$ pip install python-eventemitter

Usage
Synchronous API
from eventemitter import EventEmitter

def main():
ee = EventEmitter()

sounds: list[str] = []

ee.add_listener("sound", lambda: sounds.append("woof"))
ee.prepend_listener("sound", lambda: sounds.append("meow"))
ee.on("sound", lambda: sounds.append("oink"))

@ee.on("sound")
def from_cow():
sounds.append("moo")

@ee.once("sound")
def from_bee():
sounds.append("buzz")

ee.emit("sound") # Run events in order
print(sounds) # ['meow', 'woof', 'oink', 'moo', 'buzz']

if __name__ == "__main__":
main()

Asynchronous API
import asyncio

from eventemitter import AsyncIOEventEmitter

async def main():
aee = AsyncIOEventEmitter()

sounds: set[str] = set()

aee.add_listener("sound", lambda: sounds.add("woof"))
aee.prepend_listener("sound", lambda: sounds.add("meow"))
aee.on("sound", lambda: sounds.add("oink"))

@aee.on("sound")
def from_cow():
sounds.add("moo")

@aee.once("sound")
async def from_bee():
sounds.add("buzz")

await aee.emit("sound") # Run events concurrently
print(sounds) # {'woof', 'meow', 'buzz', 'moo', 'oink'}

if __name__ == "__main__":
asyncio.run(main())