API:Gerador de idéias para artigos
Está página faz parte da documentação da API de Ação do MediaWiki. |
Visão geral
Neste tutorial, encontrarás a demonstração de una aplicação geradora de idéias para artigos, que sugere artigos de varias categorias que não existem em Wikipedia inglesa.
Este tutorial te ensinará como fazer isto usando (GitHub e Toolforge):
Um manual passo-a-passo para desenvolver esta aplicação:
Passo 1: configurar o ambiente Python e Flask
Para configurar o Python e Flask, deve instalar a linguagem de programação Python, criar um ambiente virtual, e instalar o Flask e os Requests.
Aprende aqui mais sobre as diferenças entre as versões Python2 e Python3. Para instalar Python3 em tua máquina local, segue as instruções passo a passo nestas guias de instalação.
Aqui mostra-se como configurar o meio de desenvolvimento para construir o aplicativo:
$ mkdir article-ideas-generator
$ cd article-ideas-generator/
Isto criará um novo diretório e localizar-se-á nele.
$ python3 --version #Python 3.6.5
Este comando revisa tua versão de Python
$ python3 -m venv venv
Este comando criará um meio virtual chamado 'venv'
$ source venv/bin/activate
Isto activará o meio virtual
$ pip install Flask requests
Este comando irá instalar o [[w:pt:Flask|Flask]] e os pacotes de Requests com todas as dependéncias
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Passo 2: Criar um aplicativo de Flask simples
Mostrar uma página estática simples
Coloca o seguinte código em $HOME/article-ideas-generator/articles.py
#!/usr/bin/python3
"""
articles.py1
O código de exemplo da API de acções do MediaWiki
Neste tutorial, encontrarás a demonstração de una aplicação geradora de idéias para artigos, que sugere artigos de varias categorias que não existem em Wikipedia inglesa.
O aplicativo utiliza o módulo action=parse e o módulo prop=links como um gerador.
Licença MIT
"""
from flask import Flask, request, render_template
import requests
APP = Flask(__name__)
@APP.route('/')
def index():
""" Displays the index page accessible at '/'
"""
return render_template('articles.html')
if __name__ == '__main__':
APP.run()
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Drop this one line of code <h1>Article ideas generator</h1>
in a HTML file inside the templates
folder:
$article-ideas-generator/templates/articles.html
render_template
method which renders the template named articles.html
from the templates
directory.Next run your Flask app with the command python articles.py
and open http://127.0.0.1:5000/
to view your app in the browser.
You should be able to see "Article ideas generator" in your browser window.
Style your app
Let's do some app styling.
To do so, add link tags to load an external and internal stylesheet.
External stylesheet, in this case, is the URL of a CSS file for the font Amatic
.
Replace the existing code in $article-ideas-generator/templates/articles.html
with the following:
<link rel="stylesheet" href="//tools-static.wmflabs.org/fontcdn/css?family=Amatic+SC:700">
<link rel="stylesheet" href="//tools-static.wmflabs.org/fontcdn/css?family=Josefin+Sans">
<link rel="stylesheet" href="/static/style.css">
<h1>Article ideas generator</h1>
<p>Some ideas for topics to write articles on:</p>
Place the following code in $HOME/article-ideas-generator/static/style.css
h1 {
color: black;
font-family: 'Amatic SC', cursive;
font-size: 4.5em;
font-weight: normal;
}
p {
font-family: 'Josefin Sans', sans-serif;
font-size: 1.4em;
}
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Application layout
$HOME/article-ideas-generator ├── templates/ │ └── articles.html ├── static/ │ └── style.css ├── articles.py └── venv/
Step 3: Fetch page sections from Wikipedia:Requested articles
Let's write some code in a get_page_sections()
function in $HOME/article-ideas-generator/articles.py
to fetch page sections from Wikipedia:Requested articles.
This function takes page name as an argument and makes a GET
request to the Action API to parse sections of the page.
API call consists of an endpoint https://en.wikipedia.org/w/api.php
and query string parameters.
Some of the key parameters are:
action=parse
- module to parse content on a pagepage=page
- page title to parseprop=sections
- tells which piece of information to retrieve, in this example it is sections
def get_page_sections(page):
""" Get page sections
"""
params = {
"action": "parse",
"page": page,
"prop": "sections",
"format": "json"
}
res = SESSION.get(url=API_ENDPOINT, params=params)
data = res.json()
if 'error' in data:
return
parsed_sections = data and data['parse'] and data['parse']['sections']
sections = []
for section in parsed_sections:
if section['toclevel'] == 1:
sections.append(section['line'])
return sections
Next, extend the Python Flask route /
in $HOME/article-ideas-generator/articles.py
to call the function defined above and also pass the results returned by the function to render_template
.
APP = Flask(__name__)
SESSION = requests.Session()
API_ENDPOINT = 'https://en.wikipedia.org/w/api.php'
PAGE = {}
@APP.route('/')
def index():
""" Displays the index page accessible at '/'
"""
global PAGE
results = []
PAGE = {'name': 'Wikipedia:Requested_articles', 'type': 'category'}
results = get_page_sections(PAGE['name'])
return render_template(
"articles.html",
results=results,
pagetype=PAGE['type'])
Place the following Jinja template code in $HOME/article-ideas-generator/templates/articles.html
.
It dynamically renders an array of category buttons based on page sections obtained via the API above.
{% if results %}
<p>Choose a {{ pagetype }}</p>
<form method="POST">
{% for pagename in results %}
<button name="{{ pagetype }}" class="{{ pagetype }}" value="{{ pagename }}">{{ pagename }}</button>
{% endfor %}
{% else %}
<p>Ooooops! We couldn't find any results.</p>
<button onclick="location.href='/'">Start over</button>
</form>
{% endif %}
Place the following code in $HOME/article-ideas-generator/static/style.css
for button styling.
Passo 4: Veja mais seções baseados na seleção do usuário
Based on a category or section selected by the user in the previous step, we want to fetch subsections from Wikipedia:Requested articles.
Extend the Python Flask route /
in $HOME/article-ideas-generator/articles.py
to handle POST requests.
You can do so by adding both GET
and POST
in the methods
argument list in the route decorator.
You can then obtain category selection available in a dictionary
format from the request
object, which is passed to get_page_sections()
function for further processing.
Passo 5: exibir artigos com ligações quebradas
Let's write some code in a get_red_links()
function in $HOME/article-ideas-generator/articles.py
to fetch around 20 articles with missing links on a page.
This function takes page name as an argument, makes a GET
request to the Action API, and returns all links embedded on that page.
From further extraction, you can obtain those links that are missing and don't yet exist on English Wikipedia.
The API call consists of an endpoint https://en.wikipedia.org/w/api.php
and query string parameters.
Some of the key parameters are:
action=query
- module to query informationtitles=title
- page title to collect linksgenerator=links
- query module's submodulelinks
used as a generator module to get a set of links embedded on a pagegpllimit=20
- number of links to fetch
def get_red_links(title):
""" Get missing links on a page
"""
params = {
"action": "query",
"titles": title,
"generator": "links",
"gpllimit": 20,
"format": "json"
}
res = SESSION.get(url=API_ENDPOINT, params=params)
data = res.json()
pages = data and data['query'] and data['query']['pages']
links = []
for page in pages.values():
if 'missing' in page:
links.append(page['title'])
return links
Next, extend the if
block for the POST
method in the /
route in $HOME/article-ideas-generator/articles.py
to call the get_red_links()
function if the page from which the request is issued is of type subcategory
.
if request.method == 'POST':
if 'category' in request.form:
PAGE['name'] = PAGE['name'] + '/' + request.form.to_dict()['category']
PAGE['type'] = 'subcategory'
results = get_page_sections(PAGE['name'])
elif 'subcategory' in request.form:
PAGE['name'] = PAGE['name'] + '#' + request.form.to_dict()['subcategory']
PAGE['type'] = 'links'
results = get_red_links(PAGE['name'])
Place the following Jinja template code in $HOME/article-ideas-generator/templates/articles.html
.
It dynamically renders a list of links using data obtained via the API above.
View the complete Python, CSS, and HTML code.
$HOME/article-ideas-generator/articles.py |
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#!/usr/bin/python3
"""
articles.py
MediaWiki Action API Code Samples
Article ideas generator app: suggests articles from various categories that don't yet exist on English Wikipedia. The app uses action=parse module and prop=links module as a generator.
MIT license
"""
from flask import Flask, request, render_template
import requests
APP = Flask(__name__)
SESSION = requests.Session()
API_ENDPOINT = 'https://en.wikipedia.org/w/api.php'
PAGE = {}
@APP.route('/', methods=['GET', 'POST'])
def index():
""" Displays the index page accessible at '/'
"""
global PAGE
results = []
if request.method == 'POST':
if 'category' in request.form:
PAGE['name'] = PAGE['name'] + '/' + \
request.form.to_dict()['category']
PAGE['type'] = 'subcategory'
results = get_page_sections(PAGE['name'])
elif 'subcategory' in request.form:
PAGE['name'] = PAGE['name'] + '#' + \
request.form.to_dict()['subcategory']
PAGE['type'] = 'links'
results = get_red_links(PAGE['name'])
else:
PAGE = {'name': 'Wikipedia:Requested_articles', 'type': 'category'}
results = get_page_sections(PAGE['name'])
return render_template(
"articles.html",
results=results,
pagetype=PAGE['type'])
def get_page_sections(page):
""" Get page sections
"""
params = {
"action": "parse",
"page": page,
"prop": "sections",
"format": "json"
}
res = SESSION.get(url=API_ENDPOINT, params=params)
data = res.json()
if 'error' in data:
return
parsed_sections = data and data['parse'] and data['parse']['sections']
sections = []
for section in parsed_sections:
if section['toclevel'] == 1:
sections.append(section['line'])
return sections
def get_red_links(title):
""" Get missing links on a page
"""
params = {
"action": "query",
"titles": title,
"generator": "links",
"gpllimit": 20,
"format": "json"
}
res = SESSION.get(url=API_ENDPOINT, params=params)
data = res.json()
pages = data and data['query'] and data['query']['pages']
links = []
for page in pages.values():
if 'missing' in page:
links.append(page['title'])
return links
if __name__ == '__main__':
APP.run()
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$HOME/article-ideas-generator/static/style.css |
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h1 {
color: black;
font-family: 'Amatic SC', cursive;
font-size: 4.5em;
font-weight: normal;
}
div {
left: 10%;
position: absolute;
right: 10%;
text-align: center;
top: 5%;
}
p {
font-family: 'Josefin Sans', sans-serif;
font-size: 1.4em;
}
button {
background-color: #06b6c9;
border: none;
border-radius: 5px;
color: white;
font-size: 1.2em;
margin: 5px;
padding: 20px;
}
.subcategory {
background-color: #EE6352;
}
a {
color: red;
font-size: 1.2em;
line-height: 1.4em;
}
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$HOME/article-ideas-generator/templates/articles.html |
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<title>Article ideas generator</title>
<link rel="stylesheet" href="//tools-static.wmflabs.org/fontcdn/css?family=Amatic+SC:700">
<link rel="stylesheet" href="//tools-static.wmflabs.org/fontcdn/css?family=Josefin+Sans">
<link rel="stylesheet" href="/static/style.css">
<div>
<h1>Article ideas generator</h1>
{% if 'links' in pagetype %}
<p>Some ideas for topics to write articles on:</p>
{% for link in results %}
<a href="//en.wikipedia.org/w/index.php?title={{ link }}&action=edit&redlink=1">{{ link }}
</a>
<br>
{% endfor %}
<button onclick="location.href='/'">Take me to the homepage</button>
{% else %}
{% if results %}
<p>Choose a {{ pagetype }}</p>
<form method="POST">
{% for pagename in results %}
<button name="{{ pagetype }}" class="{{ pagetype }}" value="{{ pagename }}">{{ pagename }}</button>
{% endfor %}
{% else %}
<p>Ooooops! We couldn't find any results.</p>
<button onclick="location.href='/'">Start over</button>
</form>
{% endif %}
{% endif %}
</div>
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Next steps
- Contribute a demo app that you have developed using the MediaWiki API to this code samples repository.