Help:Toolforge/Pywikibot

From Wikitech
Jump to navigation Jump to search
Warning Caution: This page may contain inaccuracies. It is currently being edited and redesigned for better readability. For further information, please see: phab:T134495

The Pywikibot Framework is a collection of Python tools that automate work on MediaWiki sites. Please review mw:Manual:Pywikibot/Installation first.

The stable version of the Pywikibot 'core' branch (formerly 'rewrite') is accessible at /shared/pywikibot/stable. If you are a developer and/or would like to control when the code is updated, you may also choose to install 'core' locally in your tool directory.

Note that the shared 'core' code consists only of the source files; each bot operator will need to create his or her own configuration files (such as 'user-config.py') and set up a PYTHONPATH and other environment variables. Please see Using the shared Pywikibot files for more information.

Using the shared Pywikibot files (recommended setup)

For most purposes, using the centralized 'core' files is recommended. The shared files are available at /data/project/shared/pywikibot/stable, and steps for configuring your tool account are provided below. The configuration files themselves are stored in your tool account in the $HOME/.pywikibot directory, or another directory, where they can be used via the -dir option (all of this is described in more detail in the instructions).

If you are a developer and/or would like to control when the code is updated, or if you would like to use the 'compat' branch instead of 'core' (not all the Pywikibot scripts have been ported to 'core'), please see Installing Pywikibot locally for instructions.

To set up your Tools account to use the shared 'core' framework:

1. Become your tool-account

maintainer@tools-login:~$ become toolname

2. In your home directory, create (or edit, if it exists already) a '.bash_profile' file to include the following line. The path should be on one line, though it may appear to be on multiple lines depending on your screen width. When you save the .bash_profile file, your settings will be updated for all future shell sessions:

export PYTHONPATH=/data/project/shared/pywikibot/stable:/data/project/shared/pywikibot/stable/scripts

3. Import the path settings into your current session:

tools.tool@tools-login$ source .bash_profile

4. In your home directory, create a subdirectory named '.pywikibot' (the '.' is important!) for bot-related files:

tools.tool@tools-login$ mkdir $HOME/.pywikibot
example of configuration for commons.wikimedia.org

5. Configure Pywikibot.

To create configuration files, use the following command and then follow the instructions. You may also use an existing configuration file (e.g., 'user-config.py') that works on another system by copying it into your .pywikibot directory:

tools.tool@tools-login$ python3 /data/project/shared/pywikibot/stable/generate_user_files.py

6. Test out your setup. In general, all jobs should be run on the grid, but it's fine to test your setup on the command line. You should see the following terminal output (or something similar):

tools.tool@tools-login$ python3 /data/project/shared/pywikibot/stable/scripts/version.py
Pywikibot: [https] r-pywikibot-core.git (df69134, g1, 2020/03/30, 11:17:54, OUTDATED)
Release version: 3.1.dev0
requests version: 2.12.4
  cacerts: /etc/ssl/certs/ca-certificates.crt
    certificate test: ok
Python: 3.5.3 (default, Sep 27 2018, 17:25:39)
[GCC 6.3.0 20170516]

Note that you do not run scripts using pwb.py, but run scripts directly, e.g., python3 /data/project/shared/pywikibot/stable/scripts/version.py. Setting PYTHONPATH means that you no longer need the pwb.py helper script to make, say, import pywikibot work.

If you need to use multiple user-config.py files, you can do so by adding -dir:<path where you want your user-config.py> to every python command. To use the local directory, use -dir:. (colon dot).

For more information about Pywikibot, please see the Pywikibot documentation. The pywikibot mailing list (pywikibot at lists.wikimedia.org) and IRC (irc://irc.freenode.net/pywikibot) channel are good places to go for additional help. Other useful information about using the centralized 'core' files is available here: User:Russell Blau/Using pywikibot on Labs

Setup pywikibot on Toolforge (locally)

Installing pywikibot local to your tool allows you to upgrade whenever it suits you, instead of always running the latest version.

Clone pywikibot git repo

Clone the 'core' git repository:

$ git clone --recursive --branch stable "https://gerrit.wikimedia.org/r/pywikibot/core" $HOME/pywikibot-core

Setup a Python virtual environment for library dependencies

When using a local pywikibot install, we recommend that you use a Python virtual environment (venv) to manage Python library dependencies. The Toolforge environment does provide system packages for many Python libraries, but these are installed using Debian packages which means that they are often older versions and not likely to be upgraded often.

Create a venv. You can give this venv any name you would like. We will use 'pwb' in this example.

$ python3 -m venv $HOME/pwb

Once you have created the venv, you can "activate" it to setup your shell's $PATH so that the python3 and pip3 binaries in the virtual environment are used by default.

$ source $HOME/pwb/bin/activate
(pwb) $

Now that the venv is created and active for your current shell session, we can install the pywikibot code from the git clone we made earlier into this venv. This basically installs the pywikibot core code as a symlink in the venv. This way, if you modify the directory, you don't need to install it again.

(pwb) $ pip3 install --upgrade pip
...
Successfully installed pip-20.0.2
(pwb) $ pip3 install --upgrade setuptools
...
Successfully installed setuptools-46.1.3
(pwb) $ cd $HOME/pywikibot-core
(pwb) $ python3 setup.py develop
...
Finished processing dependencies for pywikibot==3.0.20200326.dev0

Using the virtual environment without activating it

To use the code from outside the virtual environment (for example to submit jobs to the grid engine), use the full paths to the python3 inside your venv directory and the full path to the script you want to run:

$ $HOME/pwb/bin/python3 $HOME/path/to/script.py

Setup job submission

After installing, you can run your bot directly via a shell command, though this is highly discouraged. You should use the grid to run jobs instead.

In order to setup the submission of the jobs you want to execute and use the grid engine you should first read Help:Toolforge/Grid.

To run a bot using the grid, you might want to be in the pywikibot directory (this is not needed) - which means you have to write a small wrapper script. The following example script (versiontest.sh) is used to run version.py:

$ cat versiontest.sh
#!/bin/bash
cd /data/project/shared/pywikibot/stable
python3 version.py

To submit a job, set the permissions for the script and then use the 'jsub' command to send the job to the grid:

$ chmod 0755 versiontest.sh
$ jsub versiontest.sh

Job output will be written to output and error files in your home directory called YOURJOBNAME.out and YOURJOBNAME.err, respectively (versiontest.out and versiontest.err in this example):

$ cat ~/versiontest.out
pywikibot [https] r/pywikibot/compat (r10211, 8fe6bdc, 2013/08/18, 14:00:57, ok)
Python 2.7.3 (default, Aug  1 2012, 05:14:39)
[GCC 4.6.3]
config-settings:
use_api = True
use_api_login = True
unicode test: ok

Example

An infinitely running job such as an irc-bot can be started like this:

$ jsub -once -continuous -l h_vmem=256M -N script_wui python3 $HOME/pywikibot-core/pwb.py script_wui.py -log

or shorter

$ jstart -l h_vmem=256M -N script_wui python3 $HOME/pywikibot-core/pwb.py script_wui.py -log

If you experience problems with your jobs, like e.g.

Fatal Python error: Couldn't create autoTLSkey mapping

you can try increasing the memory value:

$ jstart -l h_vmem=512M -N script_wui python3 $HOME/pywikibot-core/pwb.py script_wui.py -log

Now in order to create a crontab follow scheduling jobs at regular intervals with cron and setup for crontab file like:

$ crontab -e

and enter

PATH=/usr/local/bin:/usr/bin:/bin

# Run script_wui.py at 00:17 UTC each day
17 0 * * * jstart -l h_vmem=512M -N script_wui python3 $HOME/pywikibot-core/pwb.py script_wui.py -log

Using pip

The pip package manager is not installed for global use on the Toolforge servers, but it can be used through the use of virtual environments. The first step is to create a virtual environment, and get the latest version of pip installed in it:

$ python3 -m venv venv
$ source venv/bin/activate
$ pip3 install --upgrade pip

Installing specific packages from pip3 is as simple as loading the environment and then running the pip3 install command, for example:

$ source venv/bin/activate
$ pip3 install PACKAGENAME

Lastly, running a pywikibot script that depends on a pip package will also require loading the environment first, for instance:

$ source venv/bin/activate
$ python3 foo/bar/pwb.py SCRIPTNAME -page:"SOMEPAGE"

The venv does not get automatically activated in Grid job submissions. Two common workarounds are having wrapping shell scripts that activates the venv, or use absolute paths to the binaries within:

$ jstart -N jobname venv/bin/python3 foo/bar/pwb.py SCRIPTNAME -page:"SOMEPAGE"