evennia.contrib.base_systems.ingame_python.callbackhandler

Module containing the CallbackHandler for individual objects.

class evennia.contrib.base_systems.ingame_python.callbackhandler.CallbackHandler(obj)

Bases: object

The callback handler for a specific object.

The script that contains all callbacks will be reached through this handler. This handler is therefore a shortcut to be used by developers. This handler (accessible through obj.callbacks) is a shortcut to manipulating callbacks within this object, getting, adding, editing, deleting and calling them.

script = None

__init__(obj)

Initialize self. See help(type(self)) for accurate signature.

all()

Return all callbacks linked to this object.

Returns

All callbacks in a dictionary callback_name – callback}. The callback is returned as a namedtuple to simplify manipulation.

get(callback_name)

Return the callbacks associated with this name.

Parameters

callback_name (str) – the name of the callback.

Returns

A list of callbacks associated with this object and of this name.

Note

This method returns a list of callback objects (namedtuple representations). If the callback name cannot be found in the object’s callbacks, return an empty list.

get_variable(variable_name)

Return the variable value or None.

Parameters

variable_name (str) – the name of the variable.

Returns

Either the variable’s value or None.

add(callback_name, code, author=None, valid=False, parameters='')

Add a new callback for this object.

Parameters

• callback_name (str) – the name of the callback to add.

• code (str) – the Python code associated with this callback.

• author (Character or Account, optional) – the author of the callback.

• valid (bool, optional) – should the callback be connected?

• parameters (str, optional) – optional parameters.

Returns

The callback definition that was added or None.

edit(callback_name, number, code, author=None, valid=False)

Edit an existing callback bound to this object.

Parameters

• callback_name (str) – the name of the callback to edit.

• number (int) – the callback number to be changed.

• code (str) – the Python code associated with this callback.

• author (Character or Account, optional) – the author of the callback.

• valid (bool, optional) – should the callback be connected?

Returns

The callback definition that was edited or None.

Raises

RuntimeError if the callback is locked. –

remove(callback_name, number)

Delete the specified callback bound to this object.

Parameters

• callback_name (str) – the name of the callback to delete.

• number (int) – the number of the callback to delete.

Raises

RuntimeError if the callback is locked. –

call(callback_name, *args, **kwargs)

Call the specified callback(s) bound to this object.

Parameters

• callback_name (str) – the callback name to call.

• *args – additional variables for this callback.

Keyword Arguments

• number (int, optional) – call just a specific callback.

• parameters (str, optional) – call a callback with parameters.

• locals (dict, optional) – a locals replacement.

Returns

True to report the callback was called without interruption, False otherwise. If the callbackHandler isn’t found, return None.

static format_callback(callback)

Return the callback namedtuple to represent the specified callback.

Parameters

callback (dict) – the callback definition.

The callback given in argument should be a dictionary containing the expected fields for a callback (code, author, valid…).

class evennia.contrib.base_systems.ingame_python.callbackhandler.Callback(obj, name, number, code, author, valid, parameters, created_on, updated_by, updated_on)

Bases: tuple

author

Alias for field number 4

code

Alias for field number 3

created_on

Alias for field number 7

name

Alias for field number 1

number

Alias for field number 2

obj

Alias for field number 0

parameters

Alias for field number 6

updated_by

Alias for field number 8

updated_on

Alias for field number 9

valid

Alias for field number 5