查找加权数据框并应用于列

Look up weighting dataframe and apply to a column

我有两个数据框:

df1:

    Variable Name      Weight
     Variable1           2
     Variable2           .5 

df2:

    Variable1      Variable2
        3              4 
        2              5 

如何将权重乘以每列中的数字得到结果:

df3:

    Variable1      Variable2
        6              2 
        4              2.5 

您可以将数据帧乘以系列或映射索引:

s = df1.set_index('Variable Name')['Weight']

df3 = df2 * s   # or df2.columns.map(s.get)

print(df3)

   Variable1  Variable2
0        6.0        2.0
1        4.0        2.5