我有一个我需要分组的数据帧,然后是子组.从子组我需要返回子组的内容以及列的唯一值.
df = pandas.DataFrame({'country': pandas.Series(['US', 'Canada', 'US', 'US']),
'gender': pandas.Series(['male', 'female', 'male', 'female']),
'industry': pandas.Series(['real estate', 'shipping', 'telecom', 'real estate']),
'income': pandas.Series([1, 2, 3, 4])})
def subgroup(g):
return g.groupby(['gender'])
s = df.groupby(['country']).apply(subgroup)
从s开始,我如何计算“行业”的独特性以及它所分组的“性别”?
--------------------------------------------
| US | male | [real estate, telecom] |
| |----------------------------------
| | female | [real estate] |
--------------------------------------------
| Canada | female | [shipping] |
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最佳答案 你不需要定义那个函数,你可以用groupby()和unique()来解决你的问题;
尝试:
df.groupby(['country','gender'])['industry'].unique()
输出:
country gender
Canada female [shipping]
US female [real estate]
male [real estate, telecom]
Name: industry, dtype: object
希望能帮助到你!