def get_by_date(session, calendarobj, start_date, end_date, tzone='UTC'):
""" Returns all the meetings in a given time period.
Recursive meetings are expanded as if each was a single meeting.
:arg session: the database session to use
:arg calendarobj: the calendar (object) of interest.
:arg start_date: a Date object representing the beginning of the
period
:arg start_date: a Date object representing the ending of the period
:kwarg tzone: the timezone in which the meetings should be displayed
defaults to UTC.
"""
meetings_utc = Meeting.get_by_date(session, calendarobj, start_date,
end_date, no_recursive=True)
meetings_utc.extend(Meeting.get_regular_meeting_by_date(session,
calendarobj, start_date, end_date))
meetings = []
for meeting in list(set(meetings_utc)):
meetings.append(convert_meeting_timezone(
meeting, 'UTC', tzone))
meetings.sort(key=operator.attrgetter('meeting_date'))
return meetings
