python: Stop using xrange().

Python 2 had range() and xrange().  xrange() is more efficient, but
behaves differently so range() was retained for compatibility.  Python 3
only has range() and it behaves like Python 2's xrange().

Remove explicit use of xrange() and use six.moves.range() to
make sure we're using xrange() from Python 2 or range() from Python 3.

Signed-off-by: Russell Bryant <russell@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>

debian/ovs-monitor-ipsec

@@ -39,6 +39,7 @@ import ovs.db.idl
 import ovs.unixctl
 import ovs.unixctl.server
 import ovs.vlog
+from six.moves import range
 
 vlog = ovs.vlog.Vlog("ovs-monitor-ipsec")
 root_prefix = ''                # Prefix for absolute file names, for testing.

python/ovs/json.py

@@ -16,6 +16,8 @@
 import StringIO
 import sys
 
+from six.moves import range
+
 __pychecker__ = 'no-stringiter'
 
 escapes = {ord('"'): u"\\\"",

python/ovs/ovsuuid.py

@@ -15,6 +15,8 @@
 import re
 import uuid
 
+from six.moves import range
+
 from ovs.db import error
 import ovs.db.parser
 

python/ovs/socket_util.py

@@ -19,6 +19,8 @@
 import socket
 import sys
 
+from six.moves import range
+
 import ovs.fatal_signal
 import ovs.poller
 import ovs.vlog
@@ -32,7 +34,7 @@ def make_short_name(long_name):
     long_name = os.path.abspath(long_name)
     long_dirname = os.path.dirname(long_name)
     tmpdir = os.getenv('TMPDIR', '/tmp')
-    for x in xrange(0, 1000):
+    for x in range(0, 1000):
         link_name = \
             '%s/ovs-un-py-%d-%d' % (tmpdir, random.randint(0, 10000), x)
         try:

python/ovs/unixctl/server.py

@@ -17,6 +17,8 @@
 import os
 import types
 
+from six.moves import range
+
 import ovs.dirs
 import ovs.jsonrpc
 import ovs.stream

python/ovs/vlog.py

@@ -22,6 +22,8 @@
 import sys
 import threading
 
+from six.moves import range
+
 import ovs.dirs
 import ovs.unixctl
 import ovs.util

python/ovstest/util.py

@@ -26,6 +26,7 @@
 import subprocess
 import re
 
+from six.moves import range
 import six.moves.xmlrpc_client
 
 

tests/test-vlog.py

@@ -15,10 +15,11 @@
 import argparse
 
 import ovs.vlog
+from six.moves import range
 
 
 def main():
-    modules = [ovs.vlog.Vlog("module_%d" % i) for i in xrange(3)]
+    modules = [ovs.vlog.Vlog("module_%d" % i) for i in range(3)]
 
     parser = argparse.ArgumentParser(description="Vlog Module Tester")
     ovs.vlog.add_args(parser)

vtep/ovs-vtep

@@ -29,6 +29,7 @@ import ovs.util
 import ovs.daemon
 import ovs.unixctl.server
 import ovs.vlog
+from six.moves import range
 
 
 VERSION = "0.99"