Merge branch 'pr-7': Python 2.6 support

.travis.yml

@@ -2,12 +2,14 @@ language: python
 
 matrix:
   include:
+    - python: 2.6
+      env: TOXENV=py26
     - python: 2.7
       env: TOXENV=py27
     - python: 3.6
       env: TOXENV=py36
-#    - python: 3.7 # TODO: uncomment when Travis-CI supports it
-#      env: TOXENV=py37
+    - python: 3.7-dev
+      env: TOXENV=py37
     - python: pypy
       env: TOXENV=pypy
 

j2cli/cli.py

@@ -74,7 +74,7 @@ def render_command(cwd, environ, stdin, argv):
         epilog=''
     )
     parser.add_argument('-v', '--version', action='version',
-                        version='j2cli {}, Jinja2 {}'.format(__version__, jinja2.__version__))
+                        version='j2cli {0}, Jinja2 {1}'.format(__version__, jinja2.__version__))
 
     parser.add_argument('-f', '--format', default='?', help='Input data format', choices=['?'] + list(FORMATS.keys()))
     parser.add_argument('template', help='Template file to process')

j2cli/context.py

@@ -185,5 +185,5 @@ def read_context_data(format, f, environ):
 
     # Parse it
     if format not in FORMATS:
-        raise ValueError('{} format unavailable'.format(format))
+        raise ValueError('{0} format unavailable'.format(format))
     return FORMATS[format](data_string)

j2cli/extras/filters.py

@@ -36,7 +36,7 @@ def docker_link(value, format='{addr}:{port}'):
     # Parse the value
     m = re.match(r'(?P<proto>.+)://' r'(?P<addr>.+):' r'(?P<port>.+)$', value)
     if not m:
-        raise ValueError('The provided value does not seems to be a Docker link: {}'.format(value))
+        raise ValueError('The provided value does not seems to be a Docker link: {0}'.format(value))
     d = m.groupdict()
 
     # Format

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=py27,py36,py37,pypy
+envlist=py26,py27,py36,py37,pypy
 skip_missing_interpreters=True
 
 [testenv]