Extract publication dates from web pages
Project description
A library to extract a publication date from a web page, along with a measure of the accuracy. This was produced as a part of the mediacloud project, in order to accurately extract dates from content.
Quickstart
The date guesser uses both the url and the html to work, and uses some heuristics to decide which of many possible dates might be the best one.
from date_guesser import DateGuesser, Accuracy
guesser = DateGuesser()
# Uses url slugs when available
guess = guesser.guess_date(url='https://www.nytimes.com/2017/10/13/some_news.html',
html='<could be anything></could>')
# Returns a namedtuple with three fields
guess.date # datetime.datetime(2017, 10, 13, 0, 0, tzinfo=<UTC>)
guess.accuracy # Accuracy.DATE
guess.method # 'Found /2017/10/13/ in url'In case there are two trustworthy sources of dates, date_guesser prefers the more accurate one
html = '''
<html><head>
<meta property="article:published" itemprop="datePublished" content="2017-10-13T04:56:54-04:00" />
</head></html>'''
guess = guesser.guess_date(url='https://www.nytimes.com/2017/10/some_news.html',
html=html)
guess.date # datetime.datetime(2017, 10, 13, 4, 56, 54, tzinfo=tzoffset(None, -14400))
guess.accuracy is Accuracy.DATETIME # TrueBut date_guesser is not led astray by more accurate, less trustworthy sources of information
html = '''
<html><head>
<meta property="og:image" content="foo.com/2016/7/4/whatever.jpg"/>
</head></html>'''
guess = guesser.guess_date(url='https://www.nytimes.com/2017/10/some_news.html',
html=html)
guess.date # datetime.datetime(2017, 10, 15, 0, 0, tzinfo=<UTC>)
guess.accuracy is Accuracy.PARTIAL # TrueInstallation
The library is not yet available on PyPI, so installation is via github only for now:
pip install git+https://github.com/mitmedialab/date_guesserPerformance
We benchmarked the accuracy against the wonderful newspaper library, using one hundred urls gathered from each of four very different topics in the mediacloud system. This includes blogs and news articles, as well as many urls that have no date (in which case a guess is marked correct only if it returns None).
Vaccines
date_guesser |
newspaper |
|
|---|---|---|
1 days |
57 |
48 |
7 days |
61 |
51 |
15 days |
66 |
53 |
Aadhar Card in India
date_guesser |
newspaper |
|
|---|---|---|
1 days |
73 |
44 |
7 days |
74 |
44 |
15 days |
74 |
44 |
Donald Trump in 2017
date_guesser |
newspaper |
|
|---|---|---|
1 days |
79 |
60 |
7 days |
83 |
61 |
15 days |
85 |
61 |
Recipes for desserts and chocolate
date_guesser |
newspaper |
|
|---|---|---|
1 days |
83 |
65 |
7 days |
85 |
69 |
15 days |
87 |
69 |
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