def import_tickers(db_uri, filename):
"""Import tickers from a JSON file."""
session = get_session(get_engine(db_uri))
parser = YahooStockParser()
parser.load(filename)
importer = YahooImporter(session)
importer.import_(parser)
def fetch(db_uri, symbol, date, granularity: Granularity):
fetcher = YahooFetcher(logger=log)
begin_date = datetime.strptime(date, '%Y-%m-%d')
end_date = YahooFetcher.get_end_datetime(begin_date, granularity)
raw_data = fetcher.fetch(symbol, begin_date, end_date, granularity)
parser = YahooStockParser(logger=log)
parser.load(raw_data)
session = get_session(get_engine(db_uri))
importer = YahooImporter(session=session, logger=log)
importer.import_(parser)