werkzeug.utils.environ_property

Maps request attributes to environment variables. This works not only for the Werkzeug request object, but also any other class with an environ attribute: >>> class Test(object): ... environ = {'key': 'value'} ... test = environ_property('key') >>> var = Test() >>> var.test 'value' If you pass it a second value it's used as default if the key does not exist, the third one can be a converter that takes a value and converts it. If it raises :exc:`ValueError` or :exc:`TypeError` the default value is used. If no default value is provided `None` is used. Per default the property is read only. You have to explicitly enable it by passing ``read_only=False`` to the constructor.