Trivial, primitive, naive, and optimistic hook registry in Python

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Project description

pip install hookery

It’s really simple. There are some events in the lifetime of your simple Python application that you want to hook into, and you don’t want to be overriding methods or writing conditional code to do that. What you do is you introduce events and register hooks.

from hookery import HookRegistry

hooks = HookRegistry()

# It doesn't matter where you put the event instance.
# We set it as a hooks attribute just to keep things tidy
# in this module.
hooks.user_added = hooks.register_event('user_added')

# A dummy user storage
_users = {}


def create_user(username, password):
    _users[username] = password
    hooks.user_added.trigger(username=username)


@hooks.user_added
def notify_me():
    print('A new user has been added!')


@hooks.user_added
def say_hi(username):
    print('Hi, {}'.format(username))

Now you can create some users and let all listeners know about it:

>>> create_user('Bob', password='secret')
A new user has been added!
Hi, Bob

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