get_dbs: use _get_url in place of requests.get.

Note that this will handle errors (e.g. a file that does not exist)
and raise an exception, rather than trying to parse the error
document.

Author: Benjamin Moody

wfdb/io/download.py

@@ -258,8 +258,8 @@ def get_dbs():
     ]
 
     """
-    response = requests.get('https://physionet.org/rest/database-list/')
-    dbs = json.loads(response.content)
+    content = _get_url('https://physionet.org/rest/database-list/')
+    dbs = json.loads(content)
     dbs = [[d['slug'], d['title']] for d in dbs]
     dbs.sort()