model.py 文件源码

def __call__(self, fields, geo_for, geo_in=None, cache=NopCache()):
        """Special method to make API object invocable.

        Arguments:
          * fields: list of variables to return.
          * geo_* fields must be given as dictionaries, eg:
            `{'county': '*'}`
          * cache: cache in which to store results. Not cached by default.
        """
        params = {
            'get': ','.join(fields),
            'key': self.key,
            'for': self._geo2str(geo_for),
        }
        if geo_in:
            params['in'] = self._geo2str(geo_in)

        j = fetchjson(self.endpoint, cache, self.session, params=params)
        ret = pd.DataFrame(data=j[1:], columns=j[0])
        for field in fields:
            if self.variables[field].get('predicateType') == 'int':
                ret[field] = pd.to_numeric(ret[field])
        return ret