Pandas实战教程 | 两列相减

import pandas as pd

df = pd.DataFrame([[10,6,7,8],
                   [1,9,12,14],
                   [5,8,10,6]],
                  columns = ['a','b','c','d'])

df['d - a'] = df['d'] - df['a']

print(df)

输出：

    a  b   c   d  d - a
0  10  6   7   8     -2
1   1  9  12  14     13
2   5  8  10   6      1