Use next() function on iterators

In Python 3, next() for iterators is a function rather than method.

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipalib/aci.py

@@ -107,17 +107,17 @@ class ACI:
         for token in lexer:
             # We should have the form (a = b)(a = b)...
             if token == "(":
-                var = lexer.next().strip()
+                var = next(lexer).strip()
-                operator = lexer.next()
+                operator = next(lexer)
                 if operator != "=" and operator != "!=":
                     # Peek at the next char before giving up
-                    operator = operator + lexer.next()
+                    operator = operator + next(lexer)
                     if operator != "=" and operator != "!=":
                         raise SyntaxError("No operator in target, got '%s'" % operator)
                 op = operator
-                val = lexer.next().strip()
+                val = next(lexer).strip()
                 val = self._remove_quotes(val)
-                end = lexer.next()
+                end = next(lexer)
                 if end != ")":
                     raise SyntaxError('No end parenthesis in target, got %s' % end)
 

ipapython/install/core.py

@@ -319,14 +319,14 @@ class Configurable(object):
     def run_until_executing(self, gen):
         while self.__state != _EXECUTE_RUNNING:
             try:
-                yield gen.next()
+                yield next(gen)
             except StopIteration:
                 break
 
     def __runner(self, pending_state, running_state):
         self.__transition(pending_state, running_state)
 
-        step = self.__gen.next
+        step = lambda: next(self.__gen)
         while True:
             try:
                 step()
@@ -356,7 +356,7 @@ class Configurable(object):
                 exc_info = sys.exc_info()
                 step = lambda: self.__gen.throw(*exc_info)
             else:
-                step = self.__gen.next
+                step = lambda: next(self.__gen)
 
     def _handle_exception(self, exc_info):
         assert not hasattr(super(Configurable, self), '_handle_exception')
@@ -498,7 +498,7 @@ class Composite(Configurable):
             new_validate = []
             for child, validator in validate:
                 try:
-                    validator.next()
+                    next(validator)
                 except StopIteration:
                     if child.done():
                         self.__components.remove(child)
@@ -520,7 +520,7 @@ class Composite(Configurable):
             new_execute = []
             for child, executor in execute:
                 try:
-                    executor.next()
+                    next(executor)
                 except StopIteration:
                     pass
                 else: