pull python-ox changes

Shared/lib/python3.4/site-packages/ox/net.py

@@ -5,7 +5,7 @@ from __future__ import with_statement, print_function
 import os
 import gzip
 import re
-from six import BytesIO
+from six import BytesIO, PY3
 import struct
 from six.moves import urllib
 
@@ -51,6 +51,8 @@ def open_url(url, data=None, headers=DEFAULT_HEADERS):
     if isinstance(url, bytes):
         url = url.decode('utf-8')
     url = url.replace(' ', '%20')
+    if data and PY3 and not isinstance(data, bytes):
+        data = data.encode('utf-8')
     req = urllib.request.Request(url, data, headers)
     return urllib.request.urlopen(req)
 
@@ -104,9 +106,8 @@ def save_url(url, filename, overwrite=False):
         if not os.path.exists(dirname):
             os.makedirs(dirname)
         data = read_url(url)
-        f = open(filename, 'w')
-        f.write(data)
-        f.close()
+        with open(filename, 'wb') as f:
+            f.write(data)
 
 def oshash(url):
     def get_size(url):