jinja2: add bytes and six

setup.py

@@ -25,6 +25,7 @@ setup(name=name,
       include_package_data=True,
       install_requires=[
           'setuptools', # namespaces
+          'six',
           'zc.buildout', # plays with buildout
           'jinja2>=2.7',
       ],

slapos/recipe/template/jinja2_template.py

@@ -32,12 +32,13 @@ import tempfile
 import zc.buildout
 from jinja2 import Environment, StrictUndefined, \
     BaseLoader, TemplateNotFound, PrefixLoader
+import six
 
 DEFAULT_CONTEXT = {x.__name__: x for x in (
-  abs, all, any, bin, bool, callable, chr, complex, dict, divmod,
+  abs, all, any, bin, bool, bytes, callable, chr, complex, dict, divmod,
   enumerate, filter, float, format, frozenset, hex, int,
   isinstance, iter, len, list, map, max, min, next, oct, ord,
-  pow, repr, reversed, round, set, sorted, str, sum, tuple, zip)}
+  pow, repr, reversed, round, set, six, sorted, str, sum, tuple, zip)}
 
 def _assert(x, *args):
     if x: