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EGG_TDNS_ENABLE | ||
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# Check for Python | ||
EGG_PYTHON_ENABLE | ||
EGG_PYTHON_WITHCONFIG | ||
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======================= | ||
Using the Python Module | ||
======================= | ||
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In Eggdrop 1.10.0, Eggdrop was shipped with a Python module that, similar to the existing core Tcl capability, allows Eggdrop to run python scripts. | ||
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------------------- | ||
System Requirements | ||
------------------- | ||
Similar to Tcl requirements, Eggdrop requires both python and python development libraries to be installed on the host machine. On Debian/Ubuntu machines, this requires the packages python-dev AND python-is-python3 to be installed. The python-is-python3 updates symlinks on the host system that allow Eggdrop to find it. | ||
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-------------- | ||
Loading Python | ||
-------------- | ||
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Put this line into your Eggdrop configuration file to load the python module:: | ||
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loadmodule python | ||
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To load a python script from your config file, place the .py file in the scripts/ folder and add the following line to your config:: | ||
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pysource scripts/myscript.py | ||
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----------------------- | ||
Eggdrop Python Commands | ||
----------------------- | ||
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The Python module is built to use the existing core Tcl commands integrated into Eggdrop via the ``eggdrop.tcl`` module. To call an existing Tcl command from Python, you can either load the entire catalog by running ``import eggdrop.tcl``, or be more specific by ``from eggdrop.tcl import putserv, putlog, chanlist``, etc. | ||
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Arguments to the Tcl functions are automatically converted as follows: | ||
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* ``None`` is converted to an empty Tcl object (the empty string, ``""``) | ||
* ``List`` and ``Tuple`` is converted to a ``Tcl list`` | ||
* ``Dict`` is converted to a ``Tcl dictionary`` | ||
* Everything else is converted to a string using the str() method | ||
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Return values from Tcl functions must be manually converted: | ||
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* ``""`` the empty string is automatically converted to None | ||
* everything else is returned as string | ||
* ``Tcl list`` as string can be converted to a Python ``List`` using ``parse_tcl_list`` | ||
* ``Tcl dictionary`` as string can be converted to a Python ``Dict`` using ``parse_tcl_list`` | ||
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^^^^^^^^^^^^^^^^ | ||
bind <arguments> | ||
^^^^^^^^^^^^^^^^ | ||
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An important difference to note is that Eggdrop Python has its own ``bind`` command implemented. You will generally want to create binds using the Python ``bind`` command and not import bind from eggdrop.tcl because a Python bind will call a Python function, whereas using the Tcl bind will call a Tcl function (not one from the script you are writing). | ||
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The python version of the bind command is used to create a bind that triggers a python function. The python bind takes the same arguments as the Tcl binds, but here each argument is passed individually. For example, a bind that would look like ``bind pub * !foo myproc`` in Tcl is written as ``bind("pub", "*", "!foo", myproc)``. For more information on Eggsrop bind argument syntax please see :ref:`bind_types`. The eggdrop.tcl.bind command should not be used as it will attempt to call a Tcl proc. | ||
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^^^^^^^^^^^^^^^^^^^^^^^ | ||
parse_tcl_list <string> | ||
^^^^^^^^^^^^^^^^^^^^^^^ | ||
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When a python script calls a Tcl command that returns a list via the eggdrop.tcl module, the return value will be a Tcl-formatted list- also simply known as a string. The ``parse_tcl_list`` command will convert the Tcl-formatted list into a Python list, which can then freely be used within the Python script. | ||
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^^^^^^^^^^^^^^^^^^^^^^^ | ||
parse_tcl_dict <string> | ||
^^^^^^^^^^^^^^^^^^^^^^^ | ||
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When a python script calls a Tcl command that returns a dict via the eggdrop.tcl module, the return value will be a Tcl-formatted dict- also simply known as a string. The ``parse_tcl_dict`` command will convert the Tcl-formatted dict into a Python list, which can then freely be used within the Python script. | ||
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-------------------------------- | ||
Writing an Eggdrop Python script | ||
-------------------------------- | ||
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Some example scripts, complete with documentation, are included with the Python module that ships with Eggdrop (src/mod/python.mod/scripts). These scripts are included to help demonstrate script formatting and usage. The scripts are: | ||
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.. glossary:: | ||
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bestfriend.py | ||
This example script demonstrates how to use the parse_tcl_list() python command to convert a list returned by a Tcl command into a list that is usable by Python. | ||
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greet.py | ||
This is a very basic script that demonstrates how a Python script with binds can be run by Eggdrop. | ||
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imdb.py | ||
This script shows how to use an existing third-party module to extend a Python script, in this case retrieving information from imdb.com. | ||
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listtls.py | ||
This script demonstrates how to use parse-tcl_list() and parse_tcl_dict() to convert a list of dicts provided by Tcl into something that is usable by Python. | ||
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urltitle.py | ||
This script shows how to use an existing third-party module to extend a Python script, in this case using an http parser to collect title information from a provided web page. | ||
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^^^^^^^^^^^^^^ | ||
Header section | ||
^^^^^^^^^^^^^^ | ||
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Python is able to call any Tcl command by importing the ``eggdrop`` module. For example, to use the ``putlog`` command in a python script, you would import it as:: | ||
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from eggdrop.tcl import putlog | ||
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and then call it using:: | ||
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putlog("This is a logged message") | ||
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An important difference to note is that Eggdrop Python has its own ``bind`` command implemented. You will generally want to create binds using the Python ``bind`` command and not import bind from eggdrop.tcl because a Python bind will call a Python function, whereas using the Tcl bind will call a Tcl function (not one from the script you are writing). | ||
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Where does python print go? | ||
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------------------------------------- | ||
Writing a module for use with Eggdrop | ||
------------------------------------- | ||
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This is how you import a module for use with an egg python script. | ||
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Copyright (C) 2000 - 2024 Eggheads Development Team | ||
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