我有一个像这样的数据框:
Day Id Banana Apple
2020-01-01 1 1 1
2020-01-02 1 NaN 2
2020-01-03 2 2 2
如何将其转换为:
Day Id Banana Apple Products
2020-01-01 1 1 1 [Banana, Apple]
2020-01-02 1 NaN 2 [Apple, Apple]
2020-01-03 2 2 2 [Banana, Banana, Apple, Apple]
用途:
s = df.iloc[:, 2:].stack()
df['Products'] = s[s.index.repeat(s)].reset_index().groupby(['level_0'])['level_1'].agg(list)
print (df)
Day Id Banana Apple Products
0 2020-01-01 1 1.0 1 [Banana, Apple]
1 2020-01-02 1 NaN 2 [Apple, Apple]
2 2020-01-03 2 2.0 2 [Banana, Banana, Apple, Apple]