The problem is that ：
How to use groupby, obtain
class 1 2
Gender
male 180 170
Woman 160 161
（ The values in the table are the median height ）
CSDN Q & A 2022-05-15 04:47:26 阅读数:474
The problem is that ：
df.groupby([' class ',' Gender ']).median()[' height ']
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