Add Smithsonian American Art Museum lookup code

depicts/saam.py

@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+import requests
+import lxml.html
+import json
+import os
+from pprint import pprint
+
+def get_html(saam_id):
+    filename = f'cache/saam_{saam_id}.html'
+    url = 'http://americanart.si.edu/collections/search/artwork/'
+
+    if os.path.exists(filename):
+        html = open(filename).read()
+    else:
+        r = requests.get(url, params={'id': saam_id})
+        html = r.text
+        open(filename, 'w').write(html)
+
+    return html
+
+def parse_html(html):
+    root = lxml.html.fromstring(html)
+    ld = json.loads(root.findtext('.//script[@type="application/ld+json"]'))
+
+    ul = root.find('.//ul[@class="ontology-list"]')
+    assert ul.tag == 'ul'
+    keywords = [li.text for li in ul]
+    return {'ld': ld, 'keywords': keywords}
+
+def get_catalog(saam_id):
+    return parse_html(get_html(saam_id))