def flash(message, category='message'):
    session.setdefault('_flashes', []).append((category, message))
Render a Custom Template to string.
dataset/ETHPy150Open hhstore/flask-annotated/flask-0.5/flask/helpers.py/flash--crossover with--dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/horizon/test/tests/templatetags.py/TemplateTagTests.render_template