This is an example plugin for errbot generating plugins and commands dynamically

PluginMaker.py

from errbot import BotPlugin, botcmd

class PluginMaker(BotPlugin):
    """ Example demonstrating how to create an errbot plugin out of thin air.
    This basically generates a plugin from scratch and registers it at activation.
    """

    def activate(self):
        super().activate()

        commands = {}
        for command, result in [('toto', 'titi'), ('foo', 'bar')]:
            # a silly loop generating commands
            f = lambda self, msg, args: result
            f.__name__ = command
            f.__doc__ = "The documentation for %s command" % command
            commands[command] = botcmd(f)  # decorate it manually

        # create the plugin with the generated commands
        plugin_class = type('DynaPlug', (BotPlugin,), commands)
        plugin_class.__errdoc__ = 'This is the doc for the dynamic plugin'
        self.dynamic_plugin = plugin_class(self._bot)

        # register the plugin commands
        self._bot.inject_commands_from(self.dynamic_plugin)

    def deactivates(self):
        super().deactivate()
        self._bot.remove_commands_from(self.dynamic_plugin)

result.txt

>>> !help
[...]
!help DynaPlug - This is the doc for the dynamic plugin

>>> !help DynaPlug
Available commands for DynaPlug

• !foo - The documentation for foo command
• !toto - The documentation for toto command

>>> !foo
bar

>>> !toto
titi