Sum() 返回df中最后一列的副本？

Question

I am new to pandas and seem to get a repeated column rather than the sum of two. CSV result

df = pd.read_csv('0xb4a0a46d3042a739ec76fd67a3f1b99cc12ac1d9_mcap.csv', sep=',')

df1 = df.copy(deep=True)

df2 = df1.loc[:, ('mcap_token0', 'mcap_token1')]

df2 = df2.reset_index(drop=True)

df2.loc[:, 'sum'] = df2.sum(axis=1)

Answer 1

It's working fine, just you don't see it behind the decimals