From 95c8a10d8bd424ac40267bf9677c2a7d776c828b Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 23 Dec 2019 14:45:22 -0800
Subject: pubmed: null doi parsing check

---
 python/fatcat_tools/importers/pubmed.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'python')

diff --git a/python/fatcat_tools/importers/pubmed.py b/python/fatcat_tools/importers/pubmed.py
index aeac43b5..64f5a024 100644
--- a/python/fatcat_tools/importers/pubmed.py
+++ b/python/fatcat_tools/importers/pubmed.py
@@ -376,7 +376,7 @@ class PubmedImporter(EntityImporter):
         identifiers = pubmed.ArticleIdList
         pmid = medline.PMID.string.strip()
         doi = identifiers.find("ArticleId", IdType="doi")
-        if doi:
+        if doi and doi.string:
             doi = doi.string.lower().strip()
             if doi.startswith('doi:'):
                 doi = doi[4:]
-- 
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