Weigted average in pandas

g = df.groupby('Date')
df.value / g.value.transform("sum") * df.wt

Source: stackoverflow.com

Weigted average in pandas

In [11]: g = df.groupby('Date')

In [12]: df.value / g.value.transform("sum") * df.wt
Out[12]:
0    0.125000
1    0.250000
2    0.416667
3    0.277778
4    0.444444
dtype: float64

Source: stackoverflow.com

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