Source code for sceptre.resolvers.environment_variable

# -*- coding: utf-8 -*-

import os

from sceptre.resolvers import Resolver

[docs]class EnvironmentVariable(Resolver): """ Resolver for shell environment variables. :param argument: Name of the environment variable to return. :type argument: str """ def __init__(self, *args, **kwargs): super(EnvironmentVariable, self).__init__(*args, **kwargs)
[docs] def resolve(self): """ Retrieves the value of a named environment variable. :returns: Value of the environment variable. :rtype: str """ value = None if self.argument: value = os.environ.get(self.argument) return value