如何为每个对应的列创建一行[重复]

您可以尝试:

import pandas as pd
import numpy as np

df = (pd.melt(df, id_vars=['Name'], value_vars=df.columns[1:])
 .drop(columns=['variable'])
 .sort_values(by='Name')
 .pipe(lambda g: g.set_axis(np.arange(0, len(g.index)), axis=0)))

df

     Name     value
0    Jack  object 1
1    Jack  object 2
2    Jack  Object 3
3    Jack  object 4
4    John  object 1
5    John  object 2
6    John  Object 3
7    John  object 4
8   Smith  object 1
9   Smith  object 2
10  Smith  Object 3
11  Smith  object 4