HexChat Python Interface

Features

Here are some of the features of the python plugin interface:

  • Comprehensive, consistent and straightforward API
  • Load, unload, reload, and autoload support
  • Per plugin independent interpreter state
  • Python interactive console
  • Python interactive command execution
  • Python 2 and 3 support (2.9.6+)
  • Full thread support (except for Python2 on Windows)
  • Stdout and stderr redirected to HexChat console
  • Dynamic list management
  • Nice context treatment
  • Plugin preferences

Python 2 or Python 3

As of HexChat 2.9.6 the plugin supports both so which should you pick:

As a user most older scripts will not be updated for Python 3 so 2 is your best bet.

As a developer I would just recommend you make your scripts compatible for both but do note that the Python 2 plugin on Windows does not support threads while the Python 3 plugin does.

Commands

The Python plugin comes with a py command that takes these arguments.

load <file>

Load a script with given filename. /load will also work.

unload <filename|module name>

Unload module with given filename, or module name. /unload will also work.

reload <filename|module name>

Reload module with given filename, or module name. /reload will also work.

list

List Python scripts loaded

exec <command>

Execute given Python command interactively. For example:

/py exec import hexchat; print(hexchat.get_info('channel'))
console

Open the Python interactive console in a query >>python<<. Every message sent will be intercepted by the Python plugin interface, and interpreted interactively. Notice that the console and /py exec commands live in the same interpreter state.

about

Show some information about the Python plugin interface.

Autoloading modules

If you want some module to be autoloaded together with the Python plugin interface (which usually loads at startup time), just make sure it has a .py extension and put it in the addons subdir of HexChat’s config directory.

Context theory

Before starting to explain what the API offers, I’ll do a short introduction about the HexChat context concept. Not because it’s something hard to understand, but because you’ll understand better the API explanations if you know what I’m talking about.

You can think about a context as an HexChat channel, server, or query tab. Each of these tabs, has its own context, and is related to a given server and channel (queries are a special kind of channel).

The current context is the one where HexChat passes control to the module. For example, when HexChat receives a command in a specific channel, and you have asked HexChat to tell you about this event, the current context will be set to this channel before your module is called.

Text Formatting

  • Bold: '\002'
  • Color: '\003'
  • Hidden: '\010'
  • Underline: '\037'
  • Original Attributes: '\017'
  • Reverse Color: '\026'
  • Beep: '\007'
  • Italics: '\035' (2.10.0+)

For example this will print underlined red text:

print('\037\00304Text!')

Bit fields

Some lists return bit fields which many Python scripters may not be familair with so here is an example of how to use one:

...

# We know its the 15th bit field we want, this will get that value
text_strip = 1 << 15
text_strip_unset = 1 << 16 # If this is set use the global option

def get_chanopt (channel, option):
    for chan in hexchat.get_list('channels'):
        if chan.channel == channel:
            return bool(chan.flags & option)

if get_chanopt('#hexchat', text_strip_unset):
    stripped = bool(hexchat.get_prefs('text_stripcolor_msg'))
else:
    stripped = get_chanopt ('#hexchat', text_strip)

print('Color stripping in #hexchat is: {}'.format(stripped))

Hello world

Here is the traditional hello world example.

__module_name__ = "helloworld"
__module_version__ = "1.0"
__module_description__ = "Python module example"

print("Hello world!")

This module will print “Hello world!” in the HexChat console, and sleep forever until it’s unloaded. It’s a simple module, but already introduces some concepts. Notice how the module information is set. This information is obligatory, and will be shown when listing the loaded HexChat modules.

hexchat module

The hexchat module is your passport to every HexChat functionality offered by the Python plugin interface. Here’s a simple example:

import hexchat
hexchat.prnt("Hi everyone!")

The following functions are available in the hexchat module.

Constants and Attributes

hexchat.PRI_HIGHEST
hexchat.PRI_HIGH
hexchat.PRI_NORM
hexchat.PRI_LOW
hexchat.PRI_LOWEST

Priority given to hooks.

hexchat.EAT_PLUGIN
hexchat.EAT_HEXCHAT
hexchat.EAT_ALL
hexchat.EAT_NONE

Used as return values for callbacks.

hexchat.__version__

Tuple of (MAJOR_VERSION, MINOR_VERSION)

Generic functions

hexchat.prnt(string)

This function will print string in the current context. It’s mainly useful as a parameter to pass to some other function, since the usual print statement will have the same results. You have a usage example above.

This function is badly named because "print" is a reserved keyword of the Python language until Python 3.

hexchat.emit_print(event_name, *args)

This function will generate a print event with the given arguments. To check which events are available, and the number and meaning of arguments, have a look at the Settings ‣ Text Events window. Here is one example:

hexchat.emit_print("Channel Message", "John", "Hi there", "@")

With plugin version 1.0+ this function takes keywords for certain attributes such as time.

hexchat.command(string)

Execute the given command in the current context. This has the same results as executing a command in the HexChat window, but notice that the / prefix is not used. Here is an example:

hexchat.command("server irc.openprojects.net")

A list of commands is provided here: List of Commands.

hexchat.nickcmp(s1, s2)

This function will do an RFC1459 compliant string comparison and is useful to compare channels and nicknames.

Returns:Returns 0 if they match and less than or greater than 0 if s1 is less than or greather than s2
if hexchat.nickcmp(nick, "mynick") == 0:
    print("They are the same!")
hexchat.strip(text[, length=-1, flags=3])

This function can strip colors and attributes from text.

Parameters:
  • length – -1 for entire string
  • flags – 1: Strip Colors 2: Strip Attributes 3: Strip All
Returns:

Stripped String

text = '\00304\002test' # Bold red text
print(text)
print(hexchat.strip(text, len(text), 1)) # Bold uncolored text

Information retrieving functions

hexchat.get_info(type)

Retrieve the information specified by the type string in the current context. At the moment of this writing, the following information types are available to be queried:

  • away: Away reason or None if you are not away.
  • channel: Channel name of the current context.
  • charset: Charset in current context.
  • configdir: HexChat config directory e.g.: “~/.config/hexchat”.
  • event_text NAME: Returns text event string for requested event.
  • gtkwin_ptr: Returns hex representation of the pointer to the current Gtk window.
  • host: Real hostname of the server you connected to.
  • inputbox: Contents of inputbox.
  • network: Current network name or None.
  • nick: Your current nick name.
  • nickserv: Current networks password or None (password is the same with clearer name).
  • modes: Current channel modes or None.
  • password: Current networks password or None.
  • server: Current server name (what the server claims to be) or None if you are not connected.
  • topic: Current channel topic.
  • version: HexChat version number.
  • win_status: Returns status of window: ‘active’, ‘hidden’, or ‘normal’.

Example:

if hexchat.get_info("network") == 'freenode':
    hexchat.prnt('connected!')

You can also get the format of Text Events by using event_text and the event:

print(hexchat.get_info("event_text Channel Message"))
hexchat.get_prefs(name)

Retrieve the HexChat setting information specified by the name string, as available by the /set command.

print("Current preferred nick: " + hexchat.get_prefs("irc_nick1"))

A list of settings is provided here: List of Settings.

On top of that there are a few special preferences:

  • id: unique server id
  • state_cursor: location of cursor in input box
hexchat.get_list(type)

With this function you may retrieve a list containing the selected information from the current context, like a DCC list, a channel list, a user list, etc. Each list item will have its attributes set dynamically depending on the information provided by the list type.

The example below is a rewrite of the example provided with HexChat’s plugin API documentation. It prints a list of every DCC transfer happening at the moment. Notice how similar the interface is to the C API provided by HexChat.

list = hexchat.get_list("dcc")
if list:
    print("--- DCC LIST ------------------")
    print("File  To/From   KB/s   Position")
    for i in list:
        print("%6s %10s %.2f  %d" % (i.file, i.nick, i.cps/1024, i.pos))

Below you will find what each list type has to offer.

List Types

channels

The channels list type gives you access to the channels, queries and their servers. The following attributes are available in each list item:

  • channel: Channel or query name.
  • channelkey: Channel key. (2.9.6+)
  • chanmodes: Channel modes e.g. beI,k,l. (2.12.2+)
  • chantypes: Channel types e.g. #!&.
  • context: A context object, giving access to that channel/server.
  • id: Unique server id.
  • lag: Latency in milliseconds.
  • maxmodes: Max modes per line.
  • network: Network name to which this channel belongs.
  • nickprefixes: Nickname prefixes e.g. @%+.
  • nickmodes: Nickname mode chars e.g. ov.
  • queue: Number of bytes in the send-queue.
  • server: Server name to which this channel belongs.
  • users: Number of users in the channel.
  • type: Type of context.
    • 1: Server
    • 2: Channel
    • 3: Dialog
    • 4: Notices
    • 5: SNotices
  • flags: Bit field of flags:
    • 0: Connected
    • 1: Connecting
    • 2: Away
    • 3: End of MOTD (Login Complete)
    • 4: Has WHOX
    • 5: Has IDMSG
    • 6: Join/Parts hidden
    • 7: Join/Parts hidden unset
    • 8: Beep on Message
    • 9: Blink Tray
    • 10: Blink Task Bar
    • 11: Logging (This and the following are 2.10.0+)
    • 12: Logging unset
    • 13: Scrollback
    • 14: Scrollback unset
    • 15: Strip Colors
    • 16: Strip Colors unset
dcc

The dcc list type gives you access to a list of DCC file transfers. The following attributes are available in each list item:

  • address32: Address of the remote user (ipv4 address, as an int).
  • cps: Bytes per second (speed).
  • destfile: Destination full pathname.
  • file: Filename.
  • nick: Nickname of person who the file is from/to.
  • port: TCP port number.
  • pos: Bytes sent/received.
  • resume: Point at which this file was resumed (or zero if it was not resumed).
  • size: File size in bytes.
  • status: DCC status:
    • 0: queued
    • 1: active
    • 2: failed
    • 3: done
    • 4: connecting
    • 5: aborted
  • type: DCC type:
    • 0: send
    • 1: receive
    • 2: chatrecv
    • 3: chatsend
users

The users list type gives you access to a list of users in the current channel. The following attributes are available in each list item:

  • account: Account name or None (2.9.6+)
  • away: Away status.
  • host: Host name in the form user@host (or None, if not known).
  • lasttalk: Time they last talked (2.9.6+)
  • nick: Nick name.
  • prefix: Prefix character, .e.g: @ or +. Points to a single char.
  • realname: Real name.
  • selected: Selected status in the userlist.
ignore

The ignore list type gives you access to the current ignored list. The following attributes are available in each list item:

  • mask: Ignore mask (for example, “*!*@*.aol.com”).
  • flags: Bit field of flags:
    • 0: private
    • 1: notice
    • 2: channel
    • 3: ctcp
    • 4: invite
    • 5: unignore
    • 6: nosave
    • 7: dcc
notify

The notify list shows users on your friends list and their status:

  • nick: Users nickname
  • networks: Networks they are setup to notify on (None for all)
  • flags: 0 is offline, 1 is online
  • on: Time when user last came on (2.9.6+)
  • off: Time when user last logged off (2.9.6+)
  • seen: Time when user was last seen (2.9.6+)

Hook functions

These functions allow one to hook into HexChat events.

Parameters

callback

A callback is the function that will be called when the event happens.

The callback supposed to return one of the EAT_* constants, it is able control how HexChat will proceed after the callback returns. These are the available constants, and their meanings:

  • EAT_PLUGIN: Don’t let any other plugin receive this event.
  • EAT_HEXCHAT: Don’t let HexChat treat this event as usual.
  • EAT_ALL: Eat the event completely.
  • EAT_NONE: Let everything happen as usual.

Note

Returning None is the same as returning EAT_NONE.

userdata

The parameter userdata, if given, allows you to pass a custom object to your callback.

attributes

If you create a hook with hook_server_attrs() or hook_print_attrs() the last argument in the callback will be an Attribute object.

Attribute
Attribute.time

The time the event occurred (from server-time) or 0

priority

When a priority keyword parameter is accepted, it means that this callback may be hooked with five different priorities which are constants will define the order in which your plugin will be called. Most of the time, you won’t want to change its default value (PRI_NORM).

word and word_eol

These parameters, when available in a command or server callback, are lists of strings which contain the parameters the user entered for the particular command. For example, if you executed:

/command NICK Hi there!
  • word[0] is command
  • word[1] is NICK
  • word[2] is Hi
  • word[3] is there!
  • word_eol[0] is command NICK Hi there!
  • word_eol[1] is NICK Hi there!
  • word_eol[2] is Hi there!
  • word_eol[3] is there!

These parameters are also used in print events. When created by these events they have a completely different meaning though. Text events (Settings ‣ Text events) have numbered arguments associated with them, these apply to the item in the word list. For example on a “Channel Message” event:

[23:29:26] <@Nick> hello everyone
  • word[0] is Nick
  • word[1] is hello everyone
  • word[2] is @
  • word_eol[0] is Nick hello everyone @
  • word_eol[1] is hello everyone @
  • word_eol[2] is @
hexchat.hook_command(name, callback[, userdata=None, priority=PRI_NORM, help=None])

This function allows you to hook into the name HexChat command. It means that everytime you type /name ..., callback will be called. Parameters userdata and priority have their meanings explained above, and the parameter help, if given, allows you to pass a help text which will be shown when /help name is executed. If the command starts with a period it will not show up in /help though.

You may also hook an empty string to capture every message a user sends, either when they hit enter or use /say.

Returns:New Hook Handler
def onotice_cb(word, word_eol, userdata):
    if len(word) < 2:
        print("Second arg must be the message!")
    else:
        hexchat.command("NOTICE @{} {}".format(hexchat.get_info("channel"), word_eol[1]))
    return hexchat.EAT_ALL

hexchat.hook_command("ONOTICE", onotice_cb, help="/ONOTICE <message> Sends a notice to all ops")

You may return one of EAT_* constants in the callback, to control HexChat’s behavior, as explained above.

hexchat.hook_print(name, callback[, userdata=None, priority=PRI_NORM])

This function allows you to register a callback to trap any print events. The event names are available in the Settings ‣ Text Events window. Parameters userdata and priority have their meanings explained above.

Parameters:name – event name (see Settings ‣ Text Events)
Returns:New Hook Handler
def youpart_cb(word, word_eol, userdata):
    print("You have left channel " + word[2])
    return hexchat.EAT_HEXCHAT # Don't let HexChat do its normal printing

hexchat.hook_print("You Part", youpart_cb)

Along with Text Events there are a handfull of special events you can hook with this:

  • Open Context: Called when a new context is created.
  • Close Context: Called when a context is closed.
  • Focus Tab: Called when a tab is brought to front.
  • Focus Window: Called a toplevel window is focused, or the main tab-window is focused by the window manager.
  • DCC Chat Text: Called when some text from a DCC Chat arrives. It provides these elements in the word list:
    • Address
    • Port
    • Nick
    • Message
  • Key Press: Called when some keys are pressed in the input box. It provides these elements in the word list:
    • Key Value
    • State Bitfield (shift, capslock, alt)
    • String version of the key
    • Length of the string (may be 0 for unprintable keys)
hexchat.hook_print_attrs(name, callback[, userdata=None, priority=PRI_NORM])

This function is the same as hook_print() except its callback will have a new Attribute argument.

Returns:New Hook Handler

New in version 1.0.

def youpart_cb(word, word_eol, userdata, attributes):
    if attributes.time: # Time may be 0 if server-time is not enabled.
        print("You have left channel {} at {}".format(word[2], attributes.time))
        return hexchat.EAT_HEXCHAT

hexchat.hook_print_attrs("You Part", youpart_cb)
hexchat.hook_server(name, callback[, userdata=None, priority=PRI_NORM])

This function allows you to register a callback to be called when a certain server event occurs. You can use this to trap PRIVMSG, NOTICE, PART, a server numeric, etc. Parameters userdata and priority have their meanings explained above.

You can hook the special event “RAW LINE” to capture all server events.

Returns:New Hook Handler
 def kick_cb(word, word_eol, userdata):
     print('{} was kicked from {} ({})'.format(word[3], word[2], word_eol[4]))
     # Don't eat this event, let other plugins and HexChat see it too
     return hexchat.EAT_NONE

hexchat.hook_server("KICK", kick_cb)
hexchat.hook_server_attrs(name, callback[, userdata=None, priority=PRI_NORM])

This function is the same as hook_server() Except its callback will have a new Attribute argument.

Returns:New Hook Handler

New in version 1.0.

def kick_cb(word, word_eol, userdata, attributes):
    if attributes.time: # Time may be 0 if server-time is not enabled.
        print('He was kicked at {}'.format(attributes.time))
        return hexchat.EAT_NONE

hexchat.hook_server_attrs("KICK", kick_cb)
hexchat.hook_timer(timeout, callback[, userdata=None])

This function allows you to register a callback to be called every timeout milliseconds. Parameters userdata and priority have their meanings explained above. If the callback returns True the timer will repeat otherwise returning False will stop it.

Returns:New Hook Handler
myhook = None

def stop_cb(word, word_eol, userdata):
    global myhook
    if myhook is not None:
        hexchat.unhook(myhook)
        myhook = None
        print("Timeout removed!")
    return hexchat.EAT_ALL

def timeout_cb(userdata):
    print("Annoying message every 5 seconds! Type /STOP to stop it.")
    return True # Keep the timeout going

myhook = hexchat.hook_timer(5000, timeout_cb)
hexchat.hook_command("STOP", stop_cb)
hexchat.hook_unload(callback[, userdata=None])

This function allows you to register a callback to be called when the plugin is going to be unloaded. Parameters userdata and priority have their meanings explained above.

Returns:New Hook Handler
def unload_cb(userdata):
    print("We're being unloaded!")

hexchat.hook_unload(unload_cb)
hexchat.unhook(handler)

Unhooks any hook registered with the hook functions above.

Parameters:handler – Handler returned from hook_print(), hook_command(), hook_server() or hook_timer()

As of version 1.0 of the plugin hooks from hook_print() and hook_command() can be unhooked by their names.

Plugin preferences

You can use pluginpref to easily store and retrieve settings.

hexchat.set_pluginpref(name, value)

Stores settings in addon_python.conf in the config dir.

Returns:
  • False: Failure
  • True: Success

New in version 0.9.

Note

Until the plugin uses different a config file per script it’s recommened to use ‘scriptname_settingname’ to avoid conflicts.

hexchat.get_pluginpref(name)

This will return the value of the variable of that name. If there is none by this name it will return None.

Returns:String or Integer of stored setting or None if it does not exist.

Note

Strings of numbers and booleans are always returned as Integers.

New in version 0.9.

hexchat.del_pluginpref(name)

Deletes the specified variable.

Returns:
  • False: Failure
  • True: Success (or never existing),

New in version 0.9.

hexchat.list_pluginpref()

Returns a list of all currently set preferences.

Return type:List of Strings

New in version 0.9.

Context handling

Below you will find information about how to work with contexts.

Context objects

As explained in the Context theory session above, contexts give access to a specific channel/query/server tab of HexChat. Every function available in the xchat module will be evaluated in the current context, which will be specified by HexChat itself before passing control to the module. Sometimes you may want to work in a specific context, and that’s where context objects come into play.

You may create a context object using get_context() or find_context() functions as explained below, or trough the get_list() function, as explained above.

hexchat.get_context()
Return type:context
hexchat.find_context(server=None, channel=None)

Finds a context based on a channel and servername or if no parameters are given returns the current (front) context.

Parameters:
  • server – if None only looks for channel name
  • channel – if None looks for front context of given server
Return type:

context

cnc = hexchat.find_context(channel='#conectiva')
cnc.command('whois niemeyer')
context

The context object returned by the functions listed above has these methods:

context.set()

Changes the current context to be the one represented by this context object.

context.prnt(string)

Does the same as the prnt() function but in the given context.

context.emit_print(event_name, *args)

Does the same as the emit_print() function but in the given context.

context.command(string)

Does the same as the command() function but in the given context

context.get_info(type)

Does the same as the get_info() function but in the given context.

context.get_list(type)

Does the same as the get_list() function but in the given context.


Maintained by: TingPing

Original Author: Gustavo Niemeyer gustavo@niemeyer.net