# Copyright 2014-2015 Canonical Limited.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#  http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

'''
Templating using standard Python str.format() method.
'''

from charmhelpers.core import hookenv


def render(template, extra={}, **kwargs):
    """Return the template rendered using Python's str.format()."""
    context = hookenv.execution_environment()
    context.update(extra)
    context.update(kwargs)
    return template.format(**context)