用python总结三个数据帧

Question

I would like to sum three data frames and i want to sum based on a single column(hkd_margin) and it has to summed together based on account number.

The data frames look like this:

How do I do it? Need some guidance.

Answer 1

I believe you need concat with aggregate sum :

df = pd.concat([df1, df2, df3]).groupby('account_number', as_index=False)['hkd_margin'].sum()
print (df)
   account_number    hkd_margin
0              20  2.361950e+05
1              40  1.375593e+07
2              60  2.174999e+07
3              90  4.695600e+04