我有这个数据集
CREATE INDEX index_cars_for_featured_carousels_v6
ON cars USING btree
((
CASE
WHEN featuring_score::text < 'C'::text THEN 1
WHEN featuring_score::text = 'C'::text THEN 2
WHEN featuring_score::text > 'C'::text THEN 3
ELSE 4
END) ASC NULLS LAST, (
CASE
WHEN au_rating >= 3 THEN 1
WHEN au_rating = 0 THEN 2
WHEN au_rating = 2 THEN 3
WHEN au_rating = 1 THEN 4
ELSE 6
END) ASC NULLS LAST, price ASC NULLS LAST, year ASC NULLS LAST, fuel COLLATE pg_catalog."default" ASC NULLS LAST, km ASC NULLS LAST)
TABLESPACE pg_default
WHERE sales_state::text = 'onsale'::text AND is_disabled IS NOT TRUE AND featuring_score IS NOT NULL AND images_count > 0;
我想使用python进行分类并将结果保存到新列“ agegroup”中,以便 年龄 23到26在年龄组列中返回1, 27-30返回年龄组列中的值2 和31-34在年龄组列中返回3
答案 0 :(得分:3)
答案 1 :(得分:0)
您也可以使用字典来执行此操作。键值对。密钥将是不同的年龄范围,特定密钥的值将是该特定年龄组的计数。
groupDict = {'23-26':0,'27 -30':0,'31 -34':0}
for i in ages:
if i>=23 and i<=26:
groupDict['23-26']+=1
elif i>=27 and i<=30:
groupDict['27-30']+=1
elif i>=31 and i<=34:
groupDict['27-30']+=1