Display all IDs in a group only once (excel format) using Pandas

Question

I have one dateframe:

idx_value   val1    val2
idx            1    5
idx            2    6
idx            3    7
idx            4    8

I wonder if it is possible to convert table in html as following:

    val1    val2
       1    5
idx    2    6
       3    7
       4    8

I only want to show idx once. Thank you

Answer 1

Try something like a groupby + replace + set_value:

df['idx_value'] = df.groupby('idx_value')['idx_value']\
         .apply(lambda x: x.str.replace('.*', '').set_value(len(x) // 2 - 1, x[0]))

df

  idx_value  val1  val2
0               1     5
1       idx     2     6
2               3     7
3               4     8