BeautifulSoup: get css classes from html

Is there a way to get CSS classes from an HTML file using BeautifulSoup? Example snippet:

<style type="text/css">

 p.c3 {text-align: justify}

 p.c2 {text-align: left}

 p.c1 {text-align: center}

</style>

Perfect output would be:

cssdict = {
    'p.c3': {'text-align': 'justify'},
    'p.c2': {'text-align': 'left'},
    'p.c1': {'text-align': 'center'}
}

although something like this would do:

L = [
    ('p.c3', {'text-align': 'justify'}),  
    ('p.c2', {'text-align': 'left'}),    
    ('p.c1', {'text-align': 'center'})
]