diff --git a/autoapi/mappers/python.py b/autoapi/mappers/python.py
index 9463bf5..cf5639f 100644
--- a/autoapi/mappers/python.py
+++ b/autoapi/mappers/python.py
@@ -1,6 +1,5 @@
 import sys
 import os
-import re
 import textwrap
 import ast
 from collections import defaultdict
@@ -174,8 +173,8 @@ class PythonPythonMapper(PythonMapperBase):
         # exceptions, including SyntaxError
         try:
             parsed = ast.parse(source)
-        except Exception, e:  # noqa
-            print "Error parsing AST: %s" % str(e)
+        except Exception as e:  # noqa
+            print("Error parsing AST: %s" % str(e))
             return []
         parsed_args = parsed.body[0].args
         arg_names = [arg.id if sys.version_info < (3,) else arg.arg
diff --git a/autoapi/toctree.py b/autoapi/toctree.py
index e171531..134c427 100644
--- a/autoapi/toctree.py
+++ b/autoapi/toctree.py
@@ -78,8 +78,12 @@ def _get_toc_reference(node, toc, docname):
         toc_reference = _find_toc_node(toc, ref_id, nodes.section)
     else:
         # Desc node
-        ref_id = node.children[0].attributes['ids'][0]
-        toc_reference = _find_toc_node(toc, ref_id, addnodes.desc)
+        try:
+            ref_id = node.children[0].attributes['ids'][0]
+            toc_reference = _find_toc_node(toc, ref_id, addnodes.desc)
+        except IndexError as e:
+            print('Invalid desc node: %s' % e)
+            toc_reference = None
 
     return toc_reference
 
@@ -108,8 +112,8 @@ def add_domain_to_toctree(app, doctree, docname):
     for desc_node in doctree.traverse(addnodes.desc):
         try:
             ref_id = desc_node.children[0].attributes['ids'][0]
-        except IndexError, e:
-            print 'Invalid desc node: %s' % e
+        except IndexError as e:
+            print('Invalid desc node: %s' % e)
             continue
         try:
             # Python domain object