1. Adding ExtensionsΒΆ

Extensions are added to the Jinja2 environment at creation time. Once the environment is created additional extensions cannot be added. To add an extension pass a list of extension classes or import paths to the extensions parameter of the Environment constructor. The following example creates a Jinja2 environment with the i18n extension loaded:

jinja_env = Environment(extensions=['jinja2.ext.i18n'])