events_in_generator

from dataportal.broker.simple_broker import fill_event
from metadatastore.api import find_events


def events_generator(header):
    "Return a generator of Events. Large (nonscalar) data is lazy-loaded."
    descriptors = header.event_descriptors
    if len(descriptors) > 1:
        raise NotImplmementedError
    descriptor, = descriptors
    raw_events = find_events(descriptor=descriptor)
    for e in raw_events[::-1]:  # in chronological order
        fill_event(e)
        yield e