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https://github.com/attardi/wikiextractor

A tool for extracting plain text from Wikipedia dumps
https://github.com/attardi/wikiextractor

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A tool for extracting plain text from Wikipedia dumps

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# WikiExtractor

[WikiExtractor.py](http://medialab.di.unipi.it/wiki/Wikipedia_Extractor) is a Python script that extracts and cleans text from a [Wikipedia database backup dump](https://dumps.wikimedia.org/), e.g. https://dumps.wikimedia.org/enwiki/latest/enwiki-latest-pages-articles.xml.bz2 for English.



The tool is written in Python and requires Python 3 but no additional library.

**Warning**: problems have been reported on Windows due to poor support for `StringIO` in the Python implementation on Windows.



For further information, see the [Wiki](https://github.com/attardi/wikiextractor/wiki).



# Wikipedia Cirrus Extractor



`cirrus-extractor.py` is a version of the script that performs extraction from a Wikipedia Cirrus dump.

Cirrus dumps contain text with already expanded templates.



Cirrus dumps are available at:

[cirrussearch](http://dumps.wikimedia.org/other/cirrussearch/).



# Details



WikiExtractor performs template expansion by preprocessing the whole dump and extracting template definitions.



In order to speed up processing:



- multiprocessing is used for dealing with articles in parallel

- a cache is kept of parsed templates (only useful for repeated extractions).



## Installation



The script may be invoked directly:



    python -m wikiextractor.WikiExtractor 



It can also be installed from `PyPi` by doing:



    pip install wikiextractor



or locally with:



    (sudo) python setup.py install



The installer also installs two scripts for direct invocation:



    wikiextractor  	(equivalent to python -m wikiextractor.WikiExtractor)

    extractPage		(to extract a single page from a dump)



## Usage



### Wikiextractor

The script is invoked with a Wikipedia dump file as an argument:



    python -m wikiextractor.WikiExtractor  [--templates ]



The option `--templates` extracts the templates to a local file, which can be reloaded to reduce the time to perform extraction.



The output is stored in several files of similar size in a given directory.

Each file will contains several documents in this [document format](https://github.com/attardi/wikiextractor/wiki/File-Format).



```

usage: wikiextractor [-h] [-o OUTPUT] [-b n[KMG]] [-c] [--json] [--html] [-l] [-ns ns1,ns2]

			 [--templates TEMPLATES] [--no-templates] [--html-safe HTML_SAFE] [--processes PROCESSES]

			 [-q] [--debug] [-a] [-v]

			 input



Wikipedia Extractor:

Extracts and cleans text from a Wikipedia database dump and stores output in a

number of files of similar size in a given directory.

Each file will contain several documents in the format:



	

	    ...

	    



If the program is invoked with the --json flag, then each file will                                            

contain several documents formatted as json ojects, one per line, with                                         

the following structure



	{"id": "", "revid": "", "url": "", "title": "", "text": "..."}



The program performs template expansion by preprocesssng the whole dump and

collecting template definitions.



positional arguments:

  input                 XML wiki dump file



optional arguments:

  -h, --help            show this help message and exit

  --processes PROCESSES

			    Number of processes to use (default 79)



Output:

  -o OUTPUT, --output OUTPUT

			    directory for extracted files (or '-' for dumping to stdout)

  -b n[KMG], --bytes n[KMG]

			    maximum bytes per output file (default 1M)

  -c, --compress        compress output files using bzip

  --json                write output in json format instead of the default  format



Processing:

  --html                produce HTML output, subsumes --links

  -l, --links           preserve links

  -ns ns1,ns2, --namespaces ns1,ns2

			    accepted namespaces

  --templates TEMPLATES

			    use or create file containing templates

  --no-templates        Do not expand templates

  --html-safe HTML_SAFE

			    use to produce HTML safe output within ...



Special:

  -q, --quiet           suppress reporting progress info

  --debug               print debug info

  -a, --article         analyze a file containing a single article (debug option)

  -v, --version         print program version

```



Saving templates to a file will speed up performing extraction the next time,

assuming template definitions have not changed.



Option `--no-templates` significantly speeds up the extractor, avoiding the cost

of expanding [MediaWiki templates](https://www.mediawiki.org/wiki/Help:Templates).



For further information, visit [the documentation](http://attardi.github.io/wikiextractor).



### Cirrus Extractor



~~~

usage: cirrus-extract.py [-h] [-o OUTPUT] [-b n[KMG]] [-c] [-ns ns1,ns2] [-q]

                         [-v]

                         input



Wikipedia Cirrus Extractor:

Extracts and cleans text from a Wikipedia Cirrus dump and stores output in a

number of files of similar size in a given directory.

Each file will contain several documents in the format:



	

        ...

        



positional arguments:

  input                 Cirrus Json wiki dump file



optional arguments:

  -h, --help            show this help message and exit



Output:

  -o OUTPUT, --output OUTPUT

                        directory for extracted files (or '-' for dumping to

                        stdin)

  -b n[KMG], --bytes n[KMG]

                        maximum bytes per output file (default 1M)

  -c, --compress        compress output files using bzip



Processing:

  -ns ns1,ns2, --namespaces ns1,ns2

                        accepted namespaces



Special:

  -q, --quiet           suppress reporting progress info

  -v, --version         print program version

~~~



### extractPage

Extract a single page from a Wikipedia dump file.



~~~

usage: extractPage [-h] [--id ID] [--template] [-v] input



Wikipedia Page Extractor:

Extracts a single page from a Wikipedia dump file.



positional arguments:

  input          XML wiki dump file



optional arguments:

  -h, --help     show this help message and exit

  --id ID        article number

  --template     template number

  -v, --version  print program version

~~~



## License

The code is made available under the [GNU Affero General Public License v3.0](LICENSE). 



## Reference

If you find this code useful, please refer it in publications as:



~~~

@misc{Wikiextractor2015,

  author = {Giusepppe Attardi},

  title = {WikiExtractor},

  year = {2015},

  publisher = {GitHub},

  journal = {GitHub repository},

  howpublished = {\url{https://github.com/attardi/wikiextractor}}

}

~~~