evntbus

Using the event bus

from evntbus import evntbus, Event

class UserSignedInEvent(Event):
    def __init__(self, username):
        self.username = username

def first_listener(event):
    print('First', event.username)

def second_listener(event):
    print('Second', event.username)

evntbus.listen(UserSignedInEvent, first_listener)  # Default priority is 5
evntbus.listen(UserSignedInEvent, second_listener, 6)  # Priority is 6

evntbus.emit(UserSignedInEvent('some_user'))

#  Second some_user
#  First some_user

In the above example the second listen is triggered first as it's priority is higher that the first listener.

The priority can be any int, and will default at 5.

Using the listen decorator

from evntbus import Event, listen

class UserSignedInEvent(Event):
    def __init__(self, username):
        self.username = username

@listen(UserSignedInEvent)
def first_listener(event):
    print('First', event.username)

Running tests

Install the package with test dependencies

pip install -e ".[test]"

Run tox

tox