# HG changeset patch
# User Phillip Alday <phillip.alday@mpi.nl>
# Date 1535557569 -7200
#      Wed Aug 29 17:46:09 2018 +0200
# Node ID bd150ad1d8fd81347823ffa01471f969f6e90596
# Parent  65e2114df2f032908ecb046ed77db2b13de5a83f
better compatibility with python 2 + 3

diff --git a/extractbib.py b/extractbib.py
--- a/extractbib.py
+++ b/extractbib.py
@@ -51,7 +51,12 @@
    except KeyError:
       b = "@"+di['ENTRYTYPE'].upper()+"{"+ke+",\n"
 
-   for (k, v) in sorted(di.iteritems()):
+   try:
+      items = di.iteritems()
+   except AttributeError:
+      items = di.items()
+
+   for (k, v) in sorted(items):
       if k.lower().strip() in non_local_fields:
          if k == 'link':
             k = 'url'
@@ -81,7 +86,11 @@
    ## Step 3 - extract the used entries
    used_refs = {key: refs[key] for key in keys if key in refs}
    ## Step 4 - convert the dicts back into bibtex
-   refs_as_bib = [dict2bib(k, v) for (k, v) in used_refs.iteritems()]
+   try:
+      used_refs_iter = used_refs.iteritems()
+   except AttributeError:
+      used_refs_iter = used_refs.items()
+   refs_as_bib = [dict2bib(k, v) for (k, v) in used_refs_iter ]
    ## Step 5 - write the output file
    with codecs.open(out_file, 'w', 'utf-8-sig') as of:
       of.writelines(refs_as_bib)