def append(self, key, item):
        if key in self:
            raise KeyError('append(): key %r already in dictionary' % key)
        self[key] = item
Make url to fetch.
dataset/ETHPy150Open ioflo/ioflo/ioflo/aid/odicting.py/odict.append--crossover with--dataset/ETHPy150Open yinhm/datafeed/datafeed/providers/nasdaq.py/NasdaqListFetcher._make_url