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Python IRC library.

pydle is a compact, flexible and standards-abiding IRC library for Python 3.5+.


  • Well-organized: Thanks to the modularized feature system, it's not hard to find what you're looking for in the well-organised source code.
  • Standards-abiding: Based on RFC1459 with some small extension tweaks, with full support of optional extension standards:
  • Asynchronous: IRC is an asynchronous protocol and so should be a library that implements it. Coroutines are used to process events from the server asynchronously.
  • Modularised and extensible: Features on top of RFC1459 are implemented as separate modules for a user to pick and choose, and write their own. Broad features are written to be as extensible as possible.
  • Liberally licensed: The 3-clause BSD license ensures you can use it everywhere.

Basic Usage

pip install pydle

From there, you can import pydle and subclass pydle.Client for your own functionality.

Setting a nickname and starting a connection over TLS:

import pydle

# Simple echo bot.
class MyOwnBot(pydle.Client):
    async def on_connect(self):
         await self.join('#bottest')

    async def on_message(self, target, source, message):
         # don't respond to our own messages, as this leads to a positive feedback loop
         if source != self.nickname:
            await self.message(target, message)

client = MyOwnBot('MyBot', realname='My Bot')'', tls=True, tls_verify=False)

But wait, I want to handle multiple clients!

No worries! Use pydle.ClientPool like such:

pool = pydle.ClientPool()
for i in range(10):
    client = MyOwnBot('MyBot' + str(i))
    pool.connect(client, '', 6697, tls=True, tls_verify=False)

# This will make sure all clients are treated in a fair way priority-wise.

Furthermore, since pydle is simply asyncio-based, you can run the client in your own event loop, like this:

import asyncio

client = MyOwnBot('MyBot')
loop = asyncio.get_event_loop()
asyncio.ensure_future(client.connect('', tls=True, tls_verify=False), loop=loop)


If you want to customize bot features, you can subclass pydle.BasicClient and one or more features from pydle.features or your own feature classes, like such:

# Only support RFC1459 (+small features), CTCP and our own ACME extension to IRC.
class MyFeaturedBot(pydle.features.ctcp.CTCPSupport, acme.ACMESupport, rfc1459.RFC1459Support):

To create your own features, just subclass from pydle.BasicClient and start adding callbacks for IRC messages:

# Support custom ACME extension.
class ACMESupport(pydle.BasicClient):
    async def on_raw_999(self, source, params):
        """ ACME's custom 999 numeric tells us to change our nickname. """
        nickname = params[0]
        await self.set_nickname(nickname)


Q: When constructing my own client class from several base classes, I get the following error: TypeError: Cannot create a consistent method resolution order (MRO) for bases X, Y, Z. What causes this and how can I solve it?

Pydle's use of class inheritance as a feature model may cause method resolution order conflicts if a feature inherits from a different feature, while a class inherits from both the original feature and the inheriting feature. To solve such problem, pydle offers a featurize function that will automatically put all classes in the right order and create an appropriate base class:

# Purposely mis-ordered base classes, as SASLSupport inherits from CapabilityNegotiationSupport, but everything works fine.
MyBase = pydle.featurize(pydle.features.CapabilityNegotiationSupport, pydle.features.SASLSupport)
class Client(MyBase):

Q: How do I...?

Stop! Read the documentation first. If you're still in need of support, join us on IRC! We hang at #pydle on If someone is around, they'll most likely gladly help you.


Pydle is licensed under the 3-clause BSD license. See for details.