Fix an error when no publications was returned in doi.get_oa_policy()

libbmc/__init__.py

@@ -7,7 +7,7 @@ __valid_identifiers__ = []
 from . import bibtex, doi, fetcher, isbn  # noqa
 from . import citations, papers, repositories  # noqa
 
-__version__ = "0.1.2"
+__version__ = "0.1.3.1"
 
 __all__ = [
     "bibtex", "doi", "fetcher", "isbn",

libbmc/doi.py

@@ -157,6 +157,9 @@ def get_oa_policy(doi):
 
     >>> tmp = get_oa_policy('10.1209/0295-5075/111/40005'); (tmp["published"], tmp["preprint"], tmp["postprint"], tmp["romeo_id"])
     ('can', 'can', 'can', '1896')
+
+    >>> get_oa_policy('10.1215/9780822387268') is None
+    True
     """
     try:
         r = requests.get("%s%s" % (DISSEMIN_API, doi))
@@ -166,7 +169,8 @@ def get_oa_policy(doi):
         return ([i
                  for i in result["paper"]["publications"]
                  if i["doi"] == doi][0])["policy"]
-    except (AssertionError, ValueError, KeyError, RequestException):
+    except (AssertionError, ValueError,
+            KeyError, RequestException, IndexError):
         return None