Package: metatron
MetatronHTML Meta tag parser, with emphasis on OpenGraph/Twitter Cards, and
complex (and custom) meta tag schemes. Supports Python 3.x and up.
The Metatron object extends dict, and all the meta tag data is set within it.InstallationYou know the drill:pip install metatronStraight to an exampleSimple meta tag collectorThis example collects top level meta tags without a schema:> mt = Metatron(url='https://www.bbc.co.uk')
> mt.traverse()

{
    'x-country': 'gb',
    'x-audience': 'Domestic',
    'CPS_AUDIENCE': 'Domestic',
    'CPS_CHANGEQUEUEID': '115204091',
    'theme-color': 'bb1919',
    'msapplication-TileColor': '#bb1919'
}

> mt['x-country']
> 'gb'Collect structures OpenGraph meta tags> mt = Metatron(url='https://www.bbc.co.uk', schemas=['og'])
> mt.traverse()

{
    'og': {
        'title': 'Home - BBC News',
        'description': 'Visit BBC News for up-to-the-minute news....',
        'site_name': 'BBC News',
        'locale': 'en_GB',
        'article': {
            'author': 'https://www.facebook.com/bbcnews',
            'section': 'Home'
        },
        'url': 'http://www.bbc.co.uk/news',
        'image': '//m.files.bbci.co.uk/modules/bbc-morph-news-waf-page-meta/2.1.0/bbc_news_logo.png'
    }
}Supports opengraph arrays (and can receive content as input)> content = """
    <meta property="og:title" content="First title tag" />
    <meta property="og:title" content="Second title tag" />
    <meta property="og:description" content="description tag" />
    <meta property="og:image" content="http://example.com/image.jpg" />
    <meta property="og:image:secure_url" content="https://secure.example.com/image.jpg" />
    <meta property="og:image:type" content="image/jpeg" />
    <meta property="og:image:width" content="400" />
    <meta property="og:image:height" content="300" />
    <meta property="og:image:alt" content="First image description" />
    <meta property="og:image" content="http://example.com/image2.jpg" />
    <meta property="og:image:secure_url" content="https://secure.example.com/image.jpg" />
    <meta property="og:image:type" content="image/jpeg" />
    <meta property="og:image:width" content="500" />
    <meta property="og:image:height" content="600" />
    <meta property="og:image:alt" content="Second image description" />
"""

> mt = Metatron(content=content, schemas=['og'])
> mt.traverse()

{
    'og': {
        'description': 'description tag',
        'image': [
            {
                'alt': 'First image descriptoin',
                'height': '300',
                'image': 'http://example.com/image.jpg',
                'secure_url': 'https://secure.example.com/image.jpg',
                'type': 'image/jpeg',
                'width': '400'
            },
            {
                'alt': 'A shiny green apple with a bite taken out',
                'height': '600',
                'image': 'http://example.com/image2.jpg',
                'secure_url': 'https://secure.example.com/ogp.jpg',
                'type': 'image/jpeg',
                'width': '500'
            }
        ],
        'title': [
            'First title tag',
            'Second title tag'
        ]
    }
}Add your own meta tag schemaYou can provide Metatron with your own meta tag schema spec> from metatron import add_schema_spec
> my_spec = {
    'name': 'boom',
    'attribute': 'name',
    'value': 'value'
}
> add_schema_spec(my_spec)You can then parse tags like:<meta name="boom:title" value="Boom title" />
<meta name="boom:description" value="Boom description" />Using> mt = Metatron(url='http://example.com', schemas=['boom'])
> mt.traverse()
> {
    'boom': {
        'title': 'Boom title',
        'description': 'Boom description'
    }
}Note that theadd_schema_speccall allows for an additional argument to tag the schema as.
This is useful if you have multiple schema definitions with the same name (or no name).Custom schema - custom tagIt is possible to add atagkey to the custom schema spec,
which can then lookup different tags other thanmeta.
If not provided,metais used by default.Added in 0.4> from metatron import add_schema_spec
> my_spec = {
    'tag': 'link',
    'name': '',
    'attribute': 'rel',
    'value': 'href'
}
> # Register the schema as 'link' to avoid duplicating existing no-name schema
> add_schema_spec(my_spec, 'link')
> content = """
    <meta property="og:title" content="First title tag" />
    <meta property="og::title" content="Second title tag" />
    <meta property="og:description" content="description tag" />
    <meta property="og:image" content="http://example.com/image.jpg" />

    <link rel="canonical" href="https://example.com/cannonicallink/" />
"""
> mt = Metatron(content=content, schemas=['link'])
> mt.traverse()Can run from the command line$ make run URL=http://bbc.co.uk/news SCHEMA=og

or

$ python -m metatron.metatron http://bbc.co.uk/news og

$ Getting: http://bbc.co.uk/news (schemas: og)
{'og': {'description': 'Visit BBC News for up-to-the-minute news, breaking '
                   'news, video, audio and feature stories. BBC News '
                   'provides trusted World and UK news as well as local '
                   'and regional perspectives. Also entertainment, '
                   'business, science, technology and health news.',
    'image': '//m.files.bbci.co.uk/modules/bbc-morph-news-waf-page-meta/2.2.1/bbc_news_logo.png',
    'locale': 'en_GB',
    'section': 'Home',
    'site_name': 'BBC News',
    'title': 'Home - BBC News',
    'type': 'website',
    'url': 'http://www.bbc.co.uk/news'}}Dependenciesrequestsbeautifulsoup4