Use next() function instead of iter.next().

sphinx/pycode/__init__.py

@@ -18,6 +18,7 @@ from sphinx.errors import PycodeError
 from sphinx.pycode import nodes
 from sphinx.pycode.pgen2 import driver, token, tokenize, parse, literals
 from sphinx.util import get_module_source
+from sphinx.util.pycompat import next
 from sphinx.util.docstrings import prepare_docstring, prepare_commentdoc
 
 
@@ -279,7 +280,7 @@ class ModuleAnalyzer(object):
                     result[fullname] = (dtype, startline, endline)
                 expect_indent = False
             if tok in ('def', 'class'):
-                name = tokeniter.next()[1]
+                name = next(tokeniter)[1]
                 namespace.append(name)
                 fullname = '.'.join(namespace)
                 stack.append((tok, fullname, spos[0], indent))

sphinx/util/pycompat.py

@@ -34,6 +34,14 @@ else:
     b = str
 
 
+try:
+    next
+except NameError:
+    # this is on Python 2, where the method is called "next"
+    def next(iterator):
+        return iterator.next()
+
+
 try:
     any = any
     all = all