根据不同的列对数据框中的行求和

Question

How can I merge rows in the given dataframe as shown below? For each account and currency, I have to sum the values, so that there's no division by sector.

Answer 1

尝试

df.groupby(['acccount','currency'])['sum'].sum().reset_index()

Answer 2

我将对“帐户”、“货币”进行 groupby 操作，并在 sum 列上应用 sum 方法：

df.groupby(by=['account','currency'])['sum'].sum().reset_index()

Answer 3

您可以通过将account和currency设置为索引来避免 groupby，然后使用具有参数level pd.Series.sum取总和

df.set_index(['account','currency'])['sum'].sum(level=[0, 1]).reset_index()