def p_arith_expr1(p):
    p[0] = p[1]
returns a list of occurrences for this event from start to end.
dataset/ETHPy150Open nucleic/enaml/enaml/core/parser.py/p_arith_expr1--crossover with--dataset/ETHPy150Open llazzaro/django-scheduler/schedule/models/events.py/Event._get_occurrence_list