diff --git a/rst2atom.py b/rst2atom.py
index b765cc1..0a9346a 100644
--- a/rst2atom.py
+++ b/rst2atom.py
@@ -15,6 +15,10 @@ html = docutils.core.publish_parts(open(filename, mode="r").read(),
 
 
 def extract_docinfos(html):
+    """
+    Parse the publish_parts dictionary and return a dictionary containing
+    the docinfos from the RsT document.
+    """
     soup1 = bs4.BeautifulSoup(html["docinfo"], 'html.parser')
     return { tr.find("th").text:
              tr.find("td").text