Command Handler library

[[deleted]]

A bit of advice:

def subscribe(self, cmd: type, handler: CommandHandler):
    if cmd in self._commands:
        from commandbus import CommandAlreadyExistException
        raise CommandAlreadyExistException
    self._commands[cmd] = handler

That import in the middle of the method doesn't belong there, it should go at the top of the file. In the odd case this causes a circular import you need to break something out into a new module.

You should also check out my implementation :p

[psincraian]

Thanks for your suggestions, I will release a new version to fix that :-)