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[youtube-dl] / youtube_dl / extractor / academicearth.py
1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6
7
8 class AcademicEarthCourseIE(InfoExtractor):
9     _VALID_URL = r'^https?://(?:www\.)?academicearth\.org/playlists/(?P<id>[^?#/]+)'
10     IE_NAME = 'AcademicEarth:Course'
11     _TEST = {
12         'url': 'http://academicearth.org/playlists/laws-of-nature/',
13         'info_dict': {
14             'id': 'laws-of-nature',
15             'title': 'Laws of Nature',
16             'description': 'Introduce yourself to the laws of nature with these free online college lectures from Yale, Harvard, and MIT.',
17         },
18         'playlist_count': 3,
19     }
20
21     def _real_extract(self, url):
22         playlist_id = self._match_id(url)
23
24         webpage = self._download_webpage(url, playlist_id)
25         title = self._html_search_regex(
26             r'<h1 class="playlist-name"[^>]*?>(.*?)</h1>', webpage, 'title')
27         description = self._html_search_regex(
28             r'<p class="excerpt"[^>]*?>(.*?)</p>',
29             webpage, 'description', fatal=False)
30         urls = re.findall(
31             r'<li class="lecture-preview">\s*?<a target="_blank" href="([^"]+)">',
32             webpage)
33         entries = [self.url_result(u) for u in urls]
34
35         return {
36             '_type': 'playlist',
37             'id': playlist_id,
38             'title': title,
39             'description': description,
40             'entries': entries,
41         }