def multiply(traj):
    z = traj.x * traj.y
    traj.f_add_result('z', z, comment='Result of x*y')

# Create an environment that handles running the experiment
``Action`` detail view (pretty boring, mainly used for get_absolute_url)
dataset/ETHPy150Open SmokinCaterpillar/pypet/doc/source/bbd_2013_poster/example.py/multiply--crossover with--dataset/ETHPy150Open justquick/django-activity-stream/actstream/views.py/detail