

def ab_experiment_begin(key, userKey):
    db.ab_experiments.insert({
        'User': userKey,
        'Experiment': key,
        'Begin': datetime.utcnow(),
        'Variant': ab_select_variant(key, key),
    })

dataset/ETHPy150Open cpfair/tapiriik/tapiriik/web/views/ab.py ab_experiment_begin/VarMisuse@45/62 `userKey`->`key`