def store(data, date):
start_date = date - datetime.timedelta(weeks=1) # get the date from a week ago
week_ago = Analysis.date_to_str(start_date)
current_time = pandas.Timestamp(date.hour, date.minute, date.second) # time is the same a week ago as now
# store data from within a week in a pickle
data[(data['Date'] > week_ago) | ((data['Date'] == week_ago) & (data['Time'] > current_time))].to_pickle(DATASTORE)
